APA (7th ed.) Citation

Zangerl, R., & Johnson, R. G. (1957). The nature of shield abnormalities in the turtle shell.

Chicago Style (17th ed.) Citation

Zangerl, Rainer, and Ralph G. Johnson. The Nature of Shield Abnormalities in the Turtle Shell. Chicago, Ill, 1957.

MLA (9th ed.) Citation

Zangerl, Rainer, and Ralph G. Johnson. The Nature of Shield Abnormalities in the Turtle Shell. 1957.