APA

Singh R. R. S. I. C., .Labour problems. : Ratan Prakashan Mandir, Agra.

Chicago

Singh Raghu Raj Singhal I C, .Labour problems. : Ratan Prakashan Mandir, Agra.

Harvard

Singh R. R. S. I. C., .Labour problems. : Ratan Prakashan Mandir, Agra.

MLA

Singh Raghu Raj Singhal I C, .: Ratan Prakashan Mandir, Agra. .