APA

Singal r. a., .Algebra. new delhi:Rchand,2011: .

Chicago

Singal rani asha, .Algebra. new delhi:Rchand,2011: .

Harvard

Singal r. a., .Algebra. new delhi:Rchand,2011: .

MLA

Singal rani asha, .new delhi:Rchand,2011: . .