Cita APA (7th ed.)
International Progress Organisation. (1978). Studies in international cultural relations. Erdmann.
Cita Chicago (17th ed.)
International Progress Organisation. Studies in International Cultural Relations. Tübingen, Basel: Erdmann, 1978.
Cita MLA (9th ed.)
International Progress Organisation. Studies in International Cultural Relations. Erdmann, 1978.
Atenció: Aquestes cites poden no estar 100% correctes.