Cita APA (7a ed.)

Hobson, E. W. (1928). A Treatise on plane trigonometry (7a ed.). Cambridge University Press.

Cita Chicago Style (17a ed.)

Hobson, E. W. A Treatise on Plane Trigonometry. 7a ed. [S.l.]: Cambridge University Press, 1928.

Cita MLA (8a ed.)

Hobson, E. W. A Treatise on Plane Trigonometry. 7a ed. Cambridge University Press, 1928.