Não informado. (1951). International Political Science Abstracts. International Political Science Association.
Παραπομπή σε μορφή Chicago (17η εκδ.)Não informado. International Political Science Abstracts. Paris: International Political Science Association, 1951.
Παραπομπή σε μορφή MLA (8th εκδ.)Não informado. International Political Science Abstracts. International Political Science Association, 1951.
Πρόσοχή: Οι παραπομπές μπορεί να μην είναι 100% ακριβείς.