APA aipamena

Indian Standards Institution. (1980). Code of practice for sub surface exploration by pits, trenches, drifts and shafts, IS 4453-1980 (1.). Indian Standards Institution.

Chicago Style aipamena

Indian Standards Institution. Code of Practice for Sub Surface Exploration by Pits, Trenches, Drifts and Shafts, IS 4453-1980. 1. New Delhi: Indian Standards Institution, 1980.

MLA aipamena

Indian Standards Institution. Code of Practice for Sub Surface Exploration by Pits, Trenches, Drifts and Shafts, IS 4453-1980. 1. Indian Standards Institution, 1980.