APA
Summer John,, . (1993). Undocumented windows 3.1. New Delhi: BPB Publications.
Chicago
Summer John,, . 1993. Undocumented windows 3.1. New Delhi: BPB Publications.
Harvard
Summer John,, . (1993). Undocumented windows 3.1. New Delhi: BPB Publications.
MLA
Summer John,, . Undocumented windows 3.1. New Delhi: BPB Publications. 1993.