Cita APA (7th ed.)
Abbs, B., & Freebairn, I. American Blueprint: Teacher's Book. Longman.
Cita Chicago (17th ed.)
Abbs, Brian, i Ingrid Freebairn. American Blueprint: Teacher's Book. Londres, Inglaterra: Longman.
Cita MLA (9th ed.)
Abbs, Brian, i Ingrid Freebairn. American Blueprint: Teacher's Book. Longman.
Atenció: Aquestes cites poden no estar 100% correctes.