Não informado. (1968). Hokudai Economic Papers. Hokkaido University, Faculty of Economics and Business Administration.
শিকাগো স্টাইল (17 তম সংস্করণ) উদ্ধৃতিNão informado. Hokudai Economic Papers. Hokkaido, Japão: Hokkaido University, Faculty of Economics and Business Administration, 1968.
M.L.A (8 ম সংস্করণ) উদ্ধৃতিNão informado. Hokudai Economic Papers. Hokkaido University, Faculty of Economics and Business Administration, 1968.
সতর্কবাণী: সাইটেশন সবসময় 100% নির্ভুল হতে পারে না.