APA-ийн эшлэл(7 дахь хэвлэлт)

Gupta, P. K. (2016). Problems in Operations Research (4th.). S.Chand.

Чикаго-гийн эшлэл (17 дахь хэвлэлт)

Gupta, Prem Kumar. Problems in Operations Research. 4th. New Delhi: S.Chand, 2016.

MLA -ийн эшлэл (9 дэх хэвлэлт)

Gupta, Prem Kumar. Problems in Operations Research. 4th. S.Chand, 2016.