Ryan, D. (2012). Understanding Digital Marketing (2nd.). Kogan Page.
Chicagoスタイル(17版)引用形式Ryan, Damian. Understanding Digital Marketing. 2nd. Kogan Page, 2012.
MLA(9版)引用形式Ryan, Damian. Understanding Digital Marketing. 2nd. Kogan Page, 2012.
警告: この引用は必ずしも正確ではありません.