Friend, C. E., Knight, L. D., & Glazier, T. F. (2012). The least you should know about vocabulary building: Word roots (Seventh edition, International edition.). Wadsworth Cengage Learning.
Chicago-Zitierstil (17. Ausg.)Friend, Carol E., Laura D. Knight, und Teresa Ferster Glazier. The Least You Should Know About Vocabulary Building: Word Roots. Seventh edition, International edition. Australia: Wadsworth Cengage Learning, 2012.
MLA-Zitierstil (9. Ausg.)Friend, Carol E., et al. The Least You Should Know About Vocabulary Building: Word Roots. Seventh edition, International edition. Wadsworth Cengage Learning, 2012.
Achtung: Diese Zitate sind unter Umständen nicht zu 100% korrekt.