Singh, G. (2000). Map work and practical geography (4th ed.). Vikas.
Citazione stile Chigago Style (17a edizione)Singh, Gopal. Map Work and Practical Geography. 4th ed. New Delhi: Vikas, 2000.
Citatione MLA (9a ed.)Singh, Gopal. Map Work and Practical Geography. 4th ed. Vikas, 2000.
Attenzione: Queste citazioni potrebbero non essere precise al 100%.