Gaya APA

Couloumbis, T, A., Wolfe, J, H. (1990). Introduction to International Relations : Power & Justice, 4th Edition . New Jersey: Prentice-Hall International, Inc..

Gaya MLA

Couloumbis, Theodore, A., Wolfe, James, H. "Introduction to International Relations : Power & Justice, 4th Edition". New Jersey: Prentice-Hall International, Inc., 1990. Text.