APA (7e ed.) Bronvermelding

Gordon, R. L., & Stillman, D. M. (2015). Spanish vocabulary drills. McGraw-Hill Education.

Chicago (17e ed.) Bronvermelding

Gordon, Ronni L., en David M. Stillman. Spanish Vocabulary Drills. New York: McGraw-Hill Education, 2015.

MLA (9e ed.) Bronvermelding

Gordon, Ronni L., en David M. Stillman. Spanish Vocabulary Drills. McGraw-Hill Education, 2015.