Citazione APA

Hobson, E. W. (1928). Treatise on plane and advanced trigonometry (7th ed.). Dover.

Stile di citazione Chicago

Hobson, E W. Treatise on Plane and Advanced Trigonometry. 7th ed. New York: Dover, 1928.

Citazione MLA

Hobson, E W. Treatise on Plane and Advanced Trigonometry. 7th ed. Dover, 1928.