APA (7th ed.) Citation

Alonso Vallecillos, R. (2007). Spanish grammar drills. McGraw-Hill.

Chicago Style (17th ed.) Citation

Alonso Vallecillos, Rogelio. Spanish Grammar Drills. New York: McGraw-Hill, 2007.

MLA (9th ed.) Citation

Alonso Vallecillos, Rogelio. Spanish Grammar Drills. McGraw-Hill, 2007.