APA (7th ed.) Citation

Penate, J., & Escarpanter, J. (2010). Gramatica simple. [Firmas Press].

Chicago Style (17th ed.) Citation

Penate, Juan, and Jose Escarpanter. Gramatica Simple. [Miami, FL]: [Firmas Press], 2010.

MLA (9th ed.) Citation

Penate, Juan, and Jose Escarpanter. Gramatica Simple. [Firmas Press], 2010.

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