APA (7th ed.) Citation

Sarmiento, R., & Sánchez, A. (1999). Basic grammar of the spanish language (2a. ed.). SGEL.

Chicago Style (17th ed.) Citation

Sarmiento, Ramón, and Aquilino Sánchez. Basic Grammar of the Spanish Language. 2a. ed. Madrid: SGEL, 1999.

MLA (9th ed.) Citation

Sarmiento, Ramón, and Aquilino Sánchez. Basic Grammar of the Spanish Language. 2a. ed. SGEL, 1999.