APA (7th ed.) Citation

Smith, G. E., Greene, D., Hartsfield, L. A., & Pepperberg, I. M. (2021). Initial evidence for eliciting contrafreeloading in grey parrots (Psittacus erithacus) via the opportunity for playful foraging. Journal of comparative psychology (Washington, D.C. : 1983), 135(4), 516. https://doi.org/10.1037/com0000295

Chicago Style (17th ed.) Citation

Smith, Gabriella E., Diana Greene, Leigh Ann Hartsfield, and Irene M. Pepperberg. "Initial Evidence for Eliciting Contrafreeloading in Grey Parrots (Psittacus Erithacus) via the Opportunity for Playful Foraging." Journal of Comparative Psychology (Washington, D.C. : 1983) 135, no. 4 (2021): 516. https://doi.org/10.1037/com0000295.

MLA (9th ed.) Citation

Smith, Gabriella E., et al. "Initial Evidence for Eliciting Contrafreeloading in Grey Parrots (Psittacus Erithacus) via the Opportunity for Playful Foraging." Journal of Comparative Psychology (Washington, D.C. : 1983), vol. 135, no. 4, 2021, p. 516, https://doi.org/10.1037/com0000295.