APA
(1980). IS 9671:1980-Frequency Weighting for the Measurement of Aircraft Noise (D-Weighting). New Delhi: Bureau of Indian Standards (BIS).
Chicago
1980. IS 9671:1980-Frequency Weighting for the Measurement of Aircraft Noise (D-Weighting). New Delhi: Bureau of Indian Standards (BIS).
Harvard
(1980). IS 9671:1980-Frequency Weighting for the Measurement of Aircraft Noise (D-Weighting). New Delhi: Bureau of Indian Standards (BIS).
MLA
IS 9671:1980-Frequency Weighting for the Measurement of Aircraft Noise (D-Weighting). New Delhi: Bureau of Indian Standards (BIS). 1980.