Helder, C. (2014). The Ultimate book of Influence. Wiley India.
Chicagoスタイル(17版)引用形式Helder, Chris. The Ultimate Book of Influence. New Delhi: Wiley India, 2014.
MLA(9版)引用形式Helder, Chris. The Ultimate Book of Influence. Wiley India, 2014.
警告: この引用は必ずしも正確ではありません.