APA način citiranja

Young, B. E. Y., & Zook, J. R. (2016). Observation frequency and seasonality of marine birds off the Pacific coast of Costa Rica.

Čikaški stil citiranja

Young, Bruce E. Young, i James R. Zook. Observation Frequency and Seasonality of Marine Birds Off the Pacific Coast of Costa Rica. 2016.

MLA način citiranja

Young, Bruce E. Young, i James R. Zook. Observation Frequency and Seasonality of Marine Birds Off the Pacific Coast of Costa Rica. 2016.