Cita APA (7th ed.)

Nag, P. (1997). Geography and environment Vol -2 Resanal isue. Concept Pub. House.

Cita Chicago (17th ed.)

Nag, Prithvish. Geography and Environment Vol -2 Resanal Isue. New delhi: Concept Pub. House, 1997.

Cita MLA (9th ed.)

Nag, Prithvish. Geography and Environment Vol -2 Resanal Isue. Concept Pub. House, 1997.