Gaya APA

Becker., W, B, W, ;, S, D. (1986). Discovering the American past: a look at the evidence . Boston: Houghton Mifflin Company Boston.

Gaya MLA

Becker., William, Bruce, Wheeler, ;, Susan, D.. "Discovering the American past: a look at the evidence". Boston: Houghton Mifflin Company Boston, 1986. Text.