APA (7th ed.) Citation

Gehrmann, J., & Lester, T. Trigonometría.

Chicago Style (17th ed.) Citation

Gehrmann, James, and Thomas Lester. Trigonometría.

MLA (8th ed.) Citation

Gehrmann, James, and Thomas Lester. Trigonometría.

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