Dyfyniad APA

Perry, M., & Bock, G. W. (1989). Western civilization: Ideas, politics & society (3rd ed.). Houghton Mifflin.

Dyfyniad Arddull Chicago

Perry, Marvin, and George W. Bock. Western Civilization: Ideas, Politics & Society. 3rd ed. Boston: Houghton Mifflin, 1989.

Dyfyniad MLA

Perry, Marvin, and George W. Bock. Western Civilization: Ideas, Politics & Society. 3rd ed. Houghton Mifflin, 1989.

Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.