APA Citation

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

Chicago Style Citation

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

MLA Citation

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

Warning: These citations may not always be 100% accurate.