Gaya APA

McGonagle, J, J., Vella, C, M. (2001). How to use a consultant in your company : a managers` and executives` guide . New York: John Wiley & Sons.

Gaya MLA

McGonagle, John, J.., Vella, Carolyn, M.. "How to use a consultant in your company : a managers` and executives` guide". New York: John Wiley & Sons, 2001. Text.