Cita APA (7th ed.)

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

Cita Chicago (17th ed.)

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

Cita MLA (9th ed.)

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