APA-ийн эшлэл(7 дахь хэвлэлт)

Gopalakrishnan, R. (1991). Political geography of India's North East. Vikas.

Чикаго-гийн эшлэл (17 дахь хэвлэлт)

Gopalakrishnan, Ramamoorthy. Political Geography of India's North East. New Delhi: Vikas, 1991.

MLA -ийн эшлэл (9 дэх хэвлэлт)

Gopalakrishnan, Ramamoorthy. Political Geography of India's North East. Vikas, 1991.