APA (7th ed.) Citation

Boeckle, M., Szipl, G., & Bugnyar, T. (2018, March). Raven food calls indicate sender’s age and sex. Frontiers in Zoology.

Chicago Style (17th ed.) Citation

Boeckle, Markus, Georgine Szipl, and Thomas Bugnyar. "Raven Food Calls Indicate Sender’s Age and Sex." Frontiers in Zoology Mar. 2018.

MLA (9th ed.) Citation

Boeckle, Markus, et al. "Raven Food Calls Indicate Sender’s Age and Sex." Frontiers in Zoology, Mar. 2018.