Cita APA (7th ed.)
Melin, D. (1941). Contributions to the knowledge of the amphibia of South America.
Cita Chicago (17th ed.)
Melin, Douglas. Contributions to the Knowledge of the Amphibia of South America. Göteborg, 1941.
Cita MLA (9th ed.)
Melin, Douglas. Contributions to the Knowledge of the Amphibia of South America. 1941.
Atenció: Aquestes cites poden no estar 100% correctes.