APA (7th ed.) Citation

Perry, Peden, Von Laue, & Bock. (1987). Sources of the Western tradition. Houghton Mifflin.

Chicago Style (17th ed.) Citation

Perry, Peden, Von Laue, and Bock. Sources of the Western Tradition. Boston: Houghton Mifflin, 1987.

MLA (8th ed.) Citation

Perry, et al. Sources of the Western Tradition. Houghton Mifflin, 1987.