Spykman, N. J. (1970). America's strategy in world politics: The United States and the balance of power. Maps by Richard Edes Harrison. Archon Books.
Chicago-Zitierstil (17. Ausg.)Spykman, Nicholas J. America's Strategy in World Politics: The United States and the Balance of Power. Maps by Richard Edes Harrison. Hamden, Conn: Archon Books, 1970.
MLA-Zitierstil (9. Ausg.)Spykman, Nicholas J. America's Strategy in World Politics: The United States and the Balance of Power. Maps by Richard Edes Harrison. Archon Books, 1970.
Achtung: Diese Zitate sind unter Umständen nicht zu 100% korrekt.