APA
INDIAN POSTS AND TELEGRAPHS DEPARTMENT, INDIAN POSTS AND TELEGRAPHS DEPARTMENT, . (1973). Annual report,1971-73. Calcutta: Indian Post and Telegraphs Department.
Chicago
INDIAN POSTS AND TELEGRAPHS DEPARTMENT, INDIAN POSTS AND TELEGRAPHS DEPARTMENT, . 1973. Annual report,1971-73. Calcutta: Indian Post and Telegraphs Department.
Harvard
INDIAN POSTS AND TELEGRAPHS DEPARTMENT, INDIAN POSTS AND TELEGRAPHS DEPARTMENT, . (1973). Annual report,1971-73. Calcutta: Indian Post and Telegraphs Department.
MLA
INDIAN POSTS AND TELEGRAPHS DEPARTMENT, INDIAN POSTS AND TELEGRAPHS DEPARTMENT, . Annual report,1971-73. Calcutta: Indian Post and Telegraphs Department. 1973.
