Etzel, M. J. (2004). Marketing. Boston, Mass: McGraw-Hill.
Trích dẫn kiểu ChicagoEtzel, Michael J. Marketing. Boston, Mass: McGraw-Hill, 2004.
MLA引文Etzel, Michael J. Marketing. Boston, Mass: McGraw-Hill, 2004.
警告：這些引文格式不一定是100％准確.
APA引文