Cita APA (7a ed.)

Romer, A. S. (1968). Osteology of the reptiles ([2nd. impression].). University of Chicago Press.

Cita Chicago Style (17a ed.)

Romer, Alfred Sherwood. Osteology of the Reptiles. [2nd. impression]. Chicago [etc.]: University of Chicago Press, 1968.

Cita MLA (9a ed.)

Romer, Alfred Sherwood. Osteology of the Reptiles. [2nd. impression]. University of Chicago Press, 1968.