Παραπομπή σε μορφή APA (7η εκδ.)

Hobson, E. W. (1928). A treatice on plane and advanced trigonometry (7th ed.). New York.

Παραπομπή σε μορφή Chicago (17η εκδ.)

Hobson, Ernest William. A Treatice on Plane and Advanced Trigonometry. 7th ed. Dover Publications: New York, 1928.

Παραπομπή σε μορφή MLA (9th εκδ.)

Hobson, Ernest William. A Treatice on Plane and Advanced Trigonometry. 7th ed. New York, 1928.