APA (7th ed.) Citation

Pearl, R. M. (1966). Geology (3rd rev. ed.). National Book Store.

Chicago Style (17th ed.) Citation

Pearl, Richard Maxwell. Geology. 3rd rev. ed. Manila: National Book Store, 1966.

MLA (9th ed.) Citation

Pearl, Richard Maxwell. Geology. 3rd rev. ed. National Book Store, 1966.