APA
India D. G. o. C. I. a. S., . (1983). Monthly statistics of the foreign trade of India, October 1981. Calcutta: DGCIS.
Chicago
India Directorate General of Commercial Intelligence and Statistics, . 1983. Monthly statistics of the foreign trade of India, October 1981. Calcutta: DGCIS.
Harvard
India D. G. o. C. I. a. S., . (1983). Monthly statistics of the foreign trade of India, October 1981. Calcutta: DGCIS.
MLA
India Directorate General of Commercial Intelligence and Statistics, . Monthly statistics of the foreign trade of India, October 1981. Calcutta: DGCIS. 1983.