APA aipamena

Ruiz, A. (1959). Notes on Costa Rican Opalinids. I. Opalina moreletei Metcalf.

Chicago Style aipamena

Ruiz, Armando. Notes On Costa Rican Opalinids. I. Opalina Moreletei Metcalf. 1959.

MLA aipamena

Ruiz, Armando. Notes On Costa Rican Opalinids. I. Opalina Moreletei Metcalf. 1959.

Kontuz: berrikusi erreferentzia hauek erabili aurretik.