APA (7th ed.) Citation

Gentry, T. G. (1876). Life-histories of the birds of eastern Pennsylvania. Pub. by the author.

Chicago Style (17th ed.) Citation

Gentry, Thomas G. Life-histories of the Birds of Eastern Pennsylvania. Philadelphia: Pub. by the author, 1876.

MLA (9th ed.) Citation

Gentry, Thomas G. Life-histories of the Birds of Eastern Pennsylvania. Pub. by the author, 1876.