APA

Gupta S. K. (., National Conference and exhibition on "Development of Science and technology in the last 50 years in India with special reference to North-East India, Datta R. K. (. & Dutta S. N. (. (1999). National Conference and Exhibition on "Development of Science and technology in the last 50 years in India with special reference to north-east India "(May 27-30, 1998). Shillong: Shillong College.

Chicago

Gupta S K (Ed.), National Conference and exhibition on "Development of Science and technology in the last 50 years in India with special reference to North-East India, Datta R K (Ed.) and Dutta S N (Ed.)_. 1999. National Conference and Exhibition on "Development of Science and technology in the last 50 years in India with special reference to north-east India "(May 27-30, 1998). Shillong: Shillong College.

Harvard

Gupta S. K. (., National Conference and exhibition on "Development of Science and technology in the last 50 years in India with special reference to North-East India, Datta R. K. (. and Dutta S. N. (. (1999). National Conference and Exhibition on "Development of Science and technology in the last 50 years in India with special reference to north-east India "(May 27-30, 1998). Shillong: Shillong College.

MLA

Gupta S K (Ed.), National Conference and exhibition on "Development of Science and technology in the last 50 years in India with special reference to North-East India, Datta R K (Ed.) and Dutta S N (Ed.)_. National Conference and Exhibition on "Development of Science and technology in the last 50 years in India with special reference to north-east India "(May 27-30, 1998). Shillong: Shillong College. 1999.