Gordon, R. L., & Stillman, D. M. (2006). The ultimate Spanish verb review and practice: Mastering verbs and sentence building for confident communication. McGraw-Hill.
Chicago-Zitierstil (17. Ausg.)Gordon, Ronni L., und David M. Stillman. The Ultimate Spanish Verb Review and Practice: Mastering Verbs and Sentence Building for Confident Communication. New York: McGraw-Hill, 2006.
MLA-Zitierstil (8. Ausg.)Gordon, Ronni L., und David M. Stillman. The Ultimate Spanish Verb Review and Practice: Mastering Verbs and Sentence Building for Confident Communication. McGraw-Hill, 2006.
Achtung: Diese Zitate sind unter Umständen nicht zu 100% korrekt.