Cita APA (7a ed.)

Downing, D. (2010). Barron's E-Z trigonometry ([4th ed.].). Barron's Educational Series.

Cita Chicago Style (17a ed.)

Downing, Douglas. Barron's E-Z Trigonometry. [4th ed.]. Hauppauge, N.Y.: Barron's Educational Series, 2010.

Cita MLA (8a ed.)

Downing, Douglas. Barron's E-Z Trigonometry. [4th ed.]. Barron's Educational Series, 2010.

Precaución: Estas citas no son 100% exactas.