APA
Thomas R. M., . (1994). DOS 6 and 6.2 instant reference. New Delhi: BPB Publications.
Chicago
Thomas Robert M, . 1994. DOS 6 and 6.2 instant reference. New Delhi: BPB Publications.
Harvard
Thomas R. M., . (1994). DOS 6 and 6.2 instant reference. New Delhi: BPB Publications.
MLA
Thomas Robert M, . DOS 6 and 6.2 instant reference. New Delhi: BPB Publications. 1994.