APA-referens (7:e uppl.)

Abbs, B. (1996). Blueprint one: Students' Book (18a. ed.). Longman.

Chicago-referens (17:e uppl.)

Abbs, Brian. Blueprint One: Students' Book. 18a. ed. Essex: Longman, 1996.

MLA-referens (9:e uppl.)

Abbs, Brian. Blueprint One: Students' Book. 18a. ed. Longman, 1996.