Não informado. (1963). Keio Economic Studies. Keio University, Keio Economic Society.
Παραπομπή σε μορφή Chicago (17η εκδ.)Não informado. Keio Economic Studies. Tokyo: Keio University, Keio Economic Society, 1963.
Παραπομπή σε μορφή MLA (8th εκδ.)Não informado. Keio Economic Studies. Keio University, Keio Economic Society, 1963.
Πρόσοχή: Οι παραπομπές μπορεί να μην είναι 100% ακριβείς.