(2010). 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, 2010.
MLA引文RosettaStone English: Student Workbook (Classroom Version 3). Harrisonburg, VA: Rosetta Stone, 2010.
警告:這些引文格式不一定是100%准確.