APA
(1999). Computer Systems. : Edutech Informatics India Pvt Ltd 249-C,Udyoge Vihar Phase-4.
Chicago
1999. Computer Systems. : Edutech Informatics India Pvt Ltd 249-C,Udyoge Vihar Phase-4.
Harvard
(1999). Computer Systems. : Edutech Informatics India Pvt Ltd 249-C,Udyoge Vihar Phase-4.
MLA
Computer Systems. : Edutech Informatics India Pvt Ltd 249-C,Udyoge Vihar Phase-4. 1999.