Cita APA (7th ed.)

Hall, H. S., & Knight, S. R. (1961). Trigonometría elemental. UTEHA.

Cita Chicago (17th ed.)

Hall, Henry Sinclair, i Samuel Ratcliffe Knight. Trigonometría Elemental. Ciudad de México: UTEHA, 1961.

Cita MLA (9th ed.)

Hall, Henry Sinclair, i Samuel Ratcliffe Knight. Trigonometría Elemental. UTEHA, 1961.