Não informado. (1963). Keio Economic Studies. Keio University, Keio Economic Society.
শিকাগো স্টাইল (17 তম সংস্করণ) উদ্ধৃতিNão informado. Keio Economic Studies. Tokyo: Keio University, Keio Economic Society, 1963.
M.L.A (8 ম সংস্করণ) উদ্ধৃতিNão informado. Keio Economic Studies. Keio University, Keio Economic Society, 1963.
সতর্কবাণী: সাইটেশন সবসময় 100% নির্ভুল হতে পারে না.