Cita APA (7a ed.)

Downing, P., Griffin, A., & Cornwallis, C. (2018). Sex differences in helping effort reveal the effect of future reproduction on cooperative behaviour in birds. Royal Society.

Cita Chicago Style (17a ed.)

Downing, P., A. Griffin, y C. Cornwallis. Sex Differences in Helping Effort Reveal the Effect of Future Reproduction on Cooperative Behaviour in Birds. Royal Society, 2018.

Cita MLA (9a ed.)

Downing, P., et al. Sex Differences in Helping Effort Reveal the Effect of Future Reproduction on Cooperative Behaviour in Birds. Royal Society, 2018.