APA (7th ed.) Citation

Stainforth, R. M. (1955). Ages of tertiary formations in northwest Peru. Bulletin of the American Association of Petroleum Geologists., 39, 2068.

Chicago Style (17th ed.) Citation

Stainforth, R. M. "Ages of Tertiary Formations in Northwest Peru." Bulletin of the American Association of Petroleum Geologists. 39 (1955): 2068.

MLA (9th ed.) Citation

Stainforth, R. M. "Ages of Tertiary Formations in Northwest Peru." Bulletin of the American Association of Petroleum Geologists., vol. 39, 1955, p. 2068.

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