Verderber, R., Sellnow, D. D., & Verderber, K. S. (2012). Speak. Wadsworth Cengage learning.
シカゴスタイル引用形Verderber, Rudolph, Deanna D. Sellnow, , Kathleen S. Verderber. Speak. Boston: Wadsworth Cengage learning, 2012.
MLA引用形式Verderber, Rudolph, et al. Speak. Wadsworth Cengage learning, 2012.
警告: この引用は必ずしも正確ではありません.