APA-ийн эшлэл(7 дахь хэвлэлт)

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

Чикаго-гийн эшлэл (17 дахь хэвлэлт)

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

MLA -ийн эшлэл (9 дэх хэвлэлт)

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