Bey, V., Concheff, B. J., & Yates, J. (2017). Spanish verb drills (Fifth edition.). McGraw-Hill Education.
Chicago (17e ed.) BronvermeldingBey, Vivienne, Beatrice Jorgensen Concheff, en Jean Yates. Spanish Verb Drills. Fifth edition. New York: McGraw-Hill Education, 2017.
MLA (9e ed.) BronvermeldingBey, Vivienne, et al. Spanish Verb Drills. Fifth edition. McGraw-Hill Education, 2017.
Let op: Deze citaties zijn niet altijd 100% accuraat.