Cita APA

Welty, J. C. n. 1. (1962). The Life of birds. Philadelphia: W.B. Saunders.

Citación estilo Chicago

Welty, Joel Carl n. 1901. The Life of Birds. Philadelphia: W.B. Saunders, 1962.

Cita MLA

Welty, Joel Carl n. 1901. The Life of Birds. Philadelphia: W.B. Saunders, 1962.