APA (7th ed.) Citation

Freeman, H. L. L. Systematic Status of a South American Frog, Allophryne ruthveni Gaige.

Chicago Style (17th ed.) Citation

Freeman, Howard L.; Lynch. Systematic Status of a South American Frog, Allophryne Ruthveni Gaige.

MLA (9th ed.) Citation

Freeman, Howard L.; Lynch. Systematic Status of a South American Frog, Allophryne Ruthveni Gaige.

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