APA (7th ed.) Citation

Duellman, W. E. (1958). A review of the frogs of the genus Syrrhophus in Western Mexico. University of Michigan.

Chicago Style (17th ed.) Citation

Duellman, William E. A Review of the Frogs of the Genus Syrrhophus in Western Mexico. Ann Arbor, Mich.: University of Michigan, 1958.

MLA (9th ed.) Citation

Duellman, William E. A Review of the Frogs of the Genus Syrrhophus in Western Mexico. University of Michigan, 1958.