APA (7th ed.) Citation

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

Chicago Style (17th ed.) Citation

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

MLA (8th ed.) Citation

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

Warning: These citations may not always be 100% accurate.