APA (7e ed.) Bronvermelding

Abbs, B., & Freebairn, I. (1997). Blueprint one (20a. ed.). Longman.

Chicago (17e ed.) Bronvermelding

Abbs, Brian, en Ingrid Freebairn. Blueprint One. 20a. ed. Essex: Longman, 1997.

MLA (9e ed.) Bronvermelding

Abbs, Brian, en Ingrid Freebairn. Blueprint One. 20a. ed. Longman, 1997.