APA (7th ed.) Citation

Troy, D. A. (1990). Computing fundamentals: UNIX systems. Addison-Wesley Pub. Co.

Chicago Style (17th ed.) Citation

Troy, Douglas A. Computing Fundamentals: UNIX Systems. Reading, Mass: Addison-Wesley Pub. Co, 1990.

MLA (9th ed.) Citation

Troy, Douglas A. Computing Fundamentals: UNIX Systems. Addison-Wesley Pub. Co, 1990.