APA (7th ed.) Citation

Garrel, R. M. (1951). A textbook of geology. Harper.

Chicago Style (17th ed.) Citation

Garrel, Robert M. A Textbook of Geology. Harper, 1951.

MLA (8th ed.) Citation

Garrel, Robert M. A Textbook of Geology. Harper, 1951.

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