India Ministry of Shipping & Transport Directorate of Transport Research. (1971). Port transport statistics: 1970-71. Directorate of Transport Research.
শিকাগো স্টাইল (17 তম সংস্করণ) উদ্ধৃতিIndia Ministry of Shipping & Transport Directorate of Transport Research. Port Transport Statistics: 1970-71. Directorate of Transport Research, 1971.
M.L.A (9 ম সংস্করণ) উদ্ধৃতিIndia Ministry of Shipping & Transport Directorate of Transport Research. Port Transport Statistics: 1970-71. Directorate of Transport Research, 1971.
সতর্কবাণী: সাইটেশন সবসময় 100% নির্ভুল হতে পারে না.