APA (7th ed.) Citation

Simpson, A. (1993). Mastering Wordperfect 6 for DOS. BPB Publications.

Chicago Style (17th ed.) Citation

Simpson, Alan. Mastering Wordperfect 6 for DOS. New Delhi: BPB Publications, 1993.

MLA (9th ed.) Citation

Simpson, Alan. Mastering Wordperfect 6 for DOS. BPB Publications, 1993.