- Zangerl 1969
- The turtle shell. In: C. Gans and T. S. Parsons (eds.), Biology of the Reptilia, I, pp. 311-339. Academic Press, New York.
- Zangerl 1980
- Patterns of phylogenetic differentation in the toxochelyid and cheloniid sea turtles. Amer. Zool. 20: 585-596.
- Zangerl, Medem 1958
- A new species of chelid turtle, Phrynops (Batrachemys) dahli, from Colombia. Bull. Mus. Comp. Zool. Harvard 119: 375-390.
- Zangerl 1988
- A redescription of the Australian flatback seaturtle, Natator depressus. Bishop Museum Bull. Zool. 1: 1-69.
- Zappalorti 1976
- The amateur zoologist's guide to turtles and crocodilians. Stackpole Books, Harrisburg, Pennsylvania. 208 pp.
- , 1993
- Herpetology of China. Soc. Amphib. Reptiles, Oxford (Ohio), Contrib. Herpetol., vol. 10, plate 20.
- Zug 1971a
- Buoyancy, locomotion, morphology of the pelvic girdle and hindlimb, and systematics of cryptodiran turtles. Misc. Publ. Mus. Zool., Univ. Michigan (142): 1-98.
- Zug 1966
- The penial morphology and the relationships of cryptodiran turtles. Occ. Pap. Mus. Zool. Univ. Michigan (647): 1-24.
- Zug 1991
- Estimates of age and growth in Lepidochelys kempii from skeletochronological data. In: Tenth Annual Workshop on Sea Turtle Biology and Conservation, pp. 285-286. NOAA-TM-NMFS-SEFC-278.
- Zug 1977
- The matamata (Testudines: Chelidae) is Chelus not Chelys! Herpetologica 33: 53-54.
- Zug 1997
- Galápagos tortoises' nomenclature: still unresolved. Chelonian Conserv. Biol. 2(4): 618-619.
- Zug 1971b
- American musk turtles, Sternothaerus or Sternotherus? Herpetologica 27: 446-449.
- Zug 1986
- Sternotherus. Catalog. Amer. Amphib. Rept. 397: 1-3.
- Zug 1986
- Age determination of loggerhead sea turtles, Caretta caretta, by incremental growth marks in the skeleton. Smithsonian Contrib. Zool. 427. 34 pp.
- Zug 1983
- Age estimates of Cumberland Island loggerhead sea turtles. Marine Turtle Newsl. 25: 9-11.
- Zug, 1971
- Deirochelys, D. reticularia. Catalog. Amer. Amphib. Rept. 107: 1-3.
- Zug, Ernst 1994
- Lepidochelys. Catalog. Amer. Amphib. Rept. 587: 1-6.
- Zug 1998
- Lepidochelys olivacea. Catalog. Am. Amphib. Rept. 653: 1-13.
- Zwartepoorte 1991
- Verzorging en kweek in het terrarium van de geelrand-waterdoosschildpad (Cuora flavomarginata). Lacerta 50(1): 56-59.
- Zwinenberg 1976
- The olive ridley Lepidochelys olivacea (Escholtz, 1829): probably the most numerous marine turtle today. Bull. Maryland Herpetol. Soc. 12: 75-95.
- Zwinenberg 1977
- Kemp's ridley, Lepidochelys kempii (Garman, 1880), undoubtedly the most endangered marine turtle today (with notes on the current status of Lepidochelys olivacea). Bull. Maryland Herpetol. Soc. 13: 170-192.