APA-viite

Gopal Krishan. (2009). Map Series 18 India: Districts Covered by Comprehensive District Agriculture Plan Scheme, 2007.

Chicago-tyylinen lähdeviittaus

Gopal Krishan. Map Series 18 India: Districts Covered by Comprehensive District Agriculture Plan Scheme, 2007. MAN AND DEVELOPMENT, 2009.

MLA-viite

Gopal Krishan. Map Series 18 India: Districts Covered by Comprehensive District Agriculture Plan Scheme, 2007. 2009.