Gaya APA

Donovan, J., Avery, R. (2014). Speaker, Leader, Champion : Succeed at Work Through the Power of Public Speaking . New York: Mcgraw Hill Education.

Gaya MLA

Donovan, Jeremey., Avery, Ryan. "Speaker, Leader, Champion : Succeed at Work Through the Power of Public Speaking". New York: Mcgraw Hill Education, 2014. Book.