APA (7th ed.) Citation

Bullough, W. S. (1951). Vertebrate sexual cycles. Methuen [u.a.].

Chicago Style (17th ed.) Citation

Bullough, William Sydney. Vertebrate Sexual Cycles. London: Methuen [u.a.], 1951.

MLA (9th ed.) Citation

Bullough, William Sydney. Vertebrate Sexual Cycles. Methuen [u.a.], 1951.