Cita APA (7th ed.)

Simon, H. (1962). The study of birds made simple. Doubleday.

Cita Chicago (17th ed.)

Simon, Hilda. The Study of Birds Made Simple. Garden City, N. Y: Doubleday, 1962.

Cita MLA (9th ed.)

Simon, Hilda. The Study of Birds Made Simple. Doubleday, 1962.