Παραπομπή APA

Bolton, T., & Proudlove, P. (1984). Geological maps. Cambridge.

Παραπομπή Chicago Style

Bolton, T., και P. Proudlove. Geological Maps. New York: Cambridge, 1984.

Παραπομπή MLA

Bolton, T., και P. Proudlove. Geological Maps. Cambridge, 1984.