APA

Gupta (P K); Hira (D S), . (1997). Operations Research. : .

Chicago

Gupta (P K); Hira (D S), . 1997. Operations Research. : .

Harvard

Gupta (P K); Hira (D S), . (1997). Operations Research. : .

MLA

Gupta (P K); Hira (D S), . Operations Research. : . 1997.