APA

Freeman D., Graves K. & Lee L. (2005). ICON, International Communication Trough English. New York: McGraw-Hill.

Chicago

Freeman Donald, Graves Kathleen and Lee Linda. 2005. ICON, International Communication Trough English. New York: McGraw-Hill.

Harvard

Freeman D., Graves K. and Lee L. (2005). ICON, International Communication Trough English. New York: McGraw-Hill.

MLA

Freeman Donald, Graves Kathleen and Lee Linda. ICON, International Communication Trough English. New York: McGraw-Hill. 2005.