Abbs, B., & Freebairn, I. (1991). Blueprint intermediate. Student's book. Longman.
Chicago Style (17th ed.) CitationAbbs, Brian, and Ingrid Freebairn. Blueprint Intermediate. Student's Book. Harlow: Longman, 1991.
MLA (9th ed.) CitationAbbs, Brian, and Ingrid Freebairn. Blueprint Intermediate. Student's Book. Longman, 1991.