(2009). RosettaStone English: Student workbook (Classroom version 3). Harrisonburg, VA: Rosetta Stone.
シカゴスタイル引用形RosettaStone English: Student Workbook (Classroom Version 3). Harrisonburg, VA: Rosetta Stone, 2009.
MLA引用形式RosettaStone English: Student Workbook (Classroom Version 3). Harrisonburg, VA: Rosetta Stone, 2009.
警告: この引用は必ずしも正確ではありません.