APA Style

Traugott, B, K, E, C. (2006). The Grammar of the English Tense System: A Comprehensive Analysis . Berlin · New York: De Gruyter Mouton.

MLA Style

Traugott, Bernd, Kortmann, Elizabeth, Closs. "The Grammar of the English Tense System: A Comprehensive Analysis". Berlin · New York: De Gruyter Mouton, 2006. Text.