APA aipamena

Ruiz, A., & Alfaro, M. (1959). Notes on Costa Rican Opalinids. Il. Zelleriella antillensis ( Metcalf) and Z. bufoxena Metcalf.

Chicago Style aipamena

Ruiz, Armando, y Mario Alfaro. Notes On Costa Rican Opalinids. Il. Zelleriella Antillensis ( Metcalf) and Z. Bufoxena Metcalf. 1959.

MLA aipamena

Ruiz, Armando, y Mario Alfaro. Notes On Costa Rican Opalinids. Il. Zelleriella Antillensis ( Metcalf) and Z. Bufoxena Metcalf. 1959.

Kontuz: berrikusi erreferentzia hauek erabili aurretik.