APA (7th ed.) Citation

Duellman, W. E. A Synopsis of Neotropical Hylid Frogs, Genus Osteocephalus.

Chicago Style (17th ed.) Citation

Duellman, William Edward. A Synopsis of Neotropical Hylid Frogs, Genus Osteocephalus.

MLA (9th ed.) Citation

Duellman, William Edward. A Synopsis of Neotropical Hylid Frogs, Genus Osteocephalus.

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