APA-viite

Sharma,B L, & Bhardwaj,Palak. (1993). Perspective on agro-ecological problems: A geographical study in environmental impact assessment. Daya Publishing.

Chicago-tyylinen lähdeviittaus

Sharma,B L, ja Bhardwaj,Palak. Perspective on Agro-ecological Problems: A Geographical Study in Environmental Impact Assessment. Delhi: Daya Publishing, 1993.

MLA-viite

Sharma,B L, ja Bhardwaj,Palak. Perspective on Agro-ecological Problems: A Geographical Study in Environmental Impact Assessment. Daya Publishing, 1993.