APA

Sharma (J N) ;Gupta (R K), . (1991). Differential Equations. : .

Chicago

Sharma (J N) ;Gupta (R K), . 1991. Differential Equations. : .

Harvard

Sharma (J N) ;Gupta (R K), . (1991). Differential Equations. : .

MLA

Sharma (J N) ;Gupta (R K), . Differential Equations. : . 1991.