Cita APA (7th ed.)

Hobson, E. W. (1928). A treatise on plane and advanced trigonometry (7a. ed.). Dover.

Cita Chicago (17th ed.)

Hobson, E. W. A Treatise on Plane and Advanced Trigonometry. 7a. ed. Nueva York: Dover, 1928.

Cita MLA (9th ed.)

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