APA (7e ed.) Bronvermelding

Abbs, B., & Freebairn, I. (1994). Blueprint one.: Students` book (1a. ed. 6a. imp.). Longman.

Chicago (17e ed.) Bronvermelding

Abbs, Brian, en Ingrid Freebairn. Blueprint One.: Students` Book. 1a. ed. 6a. imp. Madrid: Longman, 1994.

MLA (9e ed.) Bronvermelding

Abbs, Brian, en Ingrid Freebairn. Blueprint One.: Students` Book. 1a. ed. 6a. imp. Longman, 1994.