Cita APA (7th ed.)

DUREIL, C. (1930). Key to advanced trigonometry. G.Bell.

Cita Chicago (17th ed.)

DUREIL, C.V. Key to Advanced Trigonometry. London: G.Bell, 1930.

Cita MLA (9th ed.)

DUREIL, C.V. Key to Advanced Trigonometry. G.Bell, 1930.