Singh, G. (2000). Map work and practical geography (4th ed.). Vikas.
Citación estilo ChicagoSingh, Gopal. Map Work and Practical Geography. 4th ed. New Delhi: Vikas, 2000.
Cita MLASingh, Gopal. Map Work and Practical Geography. 4th ed. Vikas, 2000.
Warning: These citations may not always be 100% accurate.