APA (7th ed.) Citation

Crosby, W. O. (1880). Contributions to the geology of Eastern Massachusetts.

Chicago Style (17th ed.) Citation

Crosby, William O. Contributions to the Geology of Eastern Massachusetts. Boston, 1880.

MLA (9th ed.) Citation

Crosby, William O. Contributions to the Geology of Eastern Massachusetts. 1880.

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