APA (7th ed.) Citation

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

Chicago Style (17th ed.) Citation

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

MLA (9th ed.) Citation

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