APA Style
Dougherty, J, E., Pfaltzgraff, R, L. (1971).
Contending theories of international relations .
pau:
Lippincott.
MLA Style
Dougherty, James, E.., Pfaltzgraff, Robert, L.,.
"Contending theories of international relations".
pau:
Lippincott,
1971.
Books.