APA (7th ed.) Citation

Gregory, J. W. (1915). Geology of to-day: A popular introduction in simple language. J. B. Lippincott; Seeley, Service.

Chicago Style (17th ed.) Citation

Gregory, J. W. Geology of To-day: A Popular Introduction in Simple Language. Philadelphia : London: J. B. Lippincott; Seeley, Service, 1915.

MLA (9th ed.) Citation

Gregory, J. W. Geology of To-day: A Popular Introduction in Simple Language. J. B. Lippincott; Seeley, Service, 1915.