Não informado. (1960). Geomorphological abstracts. Department of Geography, School of Economics and Political Science.
শিকাগো স্টাইল (17 তম সংস্করণ) উদ্ধৃতিNão informado. Geomorphological Abstracts. London: Department of Geography, School of Economics and Political Science, 1960.
M.L.A (8 ম সংস্করণ) উদ্ধৃতিNão informado. Geomorphological Abstracts. Department of Geography, School of Economics and Political Science, 1960.
সতর্কবাণী: সাইটেশন সবসময় 100% নির্ভুল হতে পারে না.