Παραπομπή σε μορφή APA (7η εκδ.)

Abbs, B., & Freebairn, I. (1990). blueprint intermediate: Teachers' book (1st ed., 3rd impression.). Longman.

Παραπομπή σε μορφή Chicago (17η εκδ.)

Abbs, Brian, και Ingrid Freebairn. Blueprint Intermediate: Teachers' Book. 1st ed., 3rd impression. Harlow, Essex: Longman, 1990.

Παραπομπή σε μορφή MLA (9th εκδ.)

Abbs, Brian, και Ingrid Freebairn. Blueprint Intermediate: Teachers' Book. 1st ed., 3rd impression. Longman, 1990.