APA (7th ed.) Citation

Yen, T. (1948). Paleocene fresh-water mollusks from Southern Montana. United States Department of the Interior, Geological Survey.

Chicago Style (17th ed.) Citation

Yen, Teng-Chien. Paleocene Fresh-water Mollusks from Southern Montana. Washington: United States Department of the Interior, Geological Survey, 1948.

MLA (9th ed.) Citation

Yen, Teng-Chien. Paleocene Fresh-water Mollusks from Southern Montana. United States Department of the Interior, Geological Survey, 1948.

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