Liebowitz, D. G. (1990). Practical vocabulary builder Blackline masters. USA: National textbook Company.
シカゴスタイル引用形Liebowitz, Dorothy Gabel. Practical Vocabulary Builder Blackline Masters. USA: National textbook Company, 1990.
MLA引用形式Liebowitz, Dorothy Gabel. Practical Vocabulary Builder Blackline Masters. USA: National textbook Company, 1990.
警告: この引用は必ずしも正確ではありません.