Cita APA (7a ed.)

Kingma, S. A. (2017). Direct benefits explain interspecific variation in helping behaviour among cooperatively breeding birds. Nature Portfolio.

Cita Chicago Style (17a ed.)

Kingma, Sjouke A. Direct Benefits Explain Interspecific Variation in Helping Behaviour Among Cooperatively Breeding Birds. Nature Portfolio, 2017.

Cita MLA (8a ed.)

Kingma, Sjouke A. Direct Benefits Explain Interspecific Variation in Helping Behaviour Among Cooperatively Breeding Birds. Nature Portfolio, 2017.