APA استشهاد

P.K.Baby. (2011). Measuring values of air quality: An economic approach to kerala's environment. Cochin University of Science and Technology.

استشهاد بنمط شيكاغو

P.K.Baby. Measuring Values of Air Quality: An Economic Approach to Kerala's Environment. India: Cochin University of Science and Technology, 2011.

MLA استشهاد

P.K.Baby. Measuring Values of Air Quality: An Economic Approach to Kerala's Environment. Cochin University of Science and Technology, 2011.