APA (7th ed.) Citation

Simpson, A. (1992). Mastering Paradox 4 for DOS. Sybex.

Chicago Style (17th ed.) Citation

Simpson, Alan. Mastering Paradox 4 for DOS. San Francisco: Sybex, 1992.

MLA (9th ed.) Citation

Simpson, Alan. Mastering Paradox 4 for DOS. Sybex, 1992.