Cita APA

Arnold, A. P., & Itoh, Y. (2011). Factors causing sex differences in birds.

Chicago Style Citation

Arnold, Arthur P., i Yuichiro Itoh. Factors Causing Sex Differences in Birds. 2011.

Cita MLA

Arnold, Arthur P., i Yuichiro Itoh. Factors Causing Sex Differences in Birds. 2011.

Atenció: Aquestes cites poden no estar 100% correctes.