Παραπομπή σε μορφή APA (7η εκδ.)

Longden, F., & O'Brien, K. (2004). English for adults: Coursebook: A three-book series taking false beginners to First Certificate level. Grivas Publications.

Παραπομπή σε μορφή Chicago (17η εκδ.)

Longden, Fiona, και Kathleen O'Brien. English for Adults: Coursebook: A Three-book Series Taking False Beginners to First Certificate Level. [Aspropyrgos]: Grivas Publications, 2004.

Παραπομπή σε μορφή MLA (8th εκδ.)

Longden, Fiona, και Kathleen O'Brien. English for Adults: Coursebook: A Three-book Series Taking False Beginners to First Certificate Level. Grivas Publications, 2004.