(2009). RosettaStone English: Student workbook (Classroom version 3). Harrisonburg, VA: Rosetta Stone.
Trích dẫn kiểu ChicagoRosettaStone English: Student Workbook (Classroom Version 3). Harrisonburg, VA: Rosetta Stone, 2009.
MLA citiranjeRosettaStone English: Student Workbook (Classroom Version 3). Harrisonburg, VA: Rosetta Stone, 2009.
Opozorilo: Ti citati niso vedno 100% točni.