APA (7th ed.) Citation

Horner, D. R. (1989). Operating systems: Concepts and applications. Scott, Foresman.

Chicago Style (17th ed.) Citation

Horner, Donald R. Operating Systems: Concepts and Applications. Glenview, Ill. u.a: Scott, Foresman, 1989.

MLA (9th ed.) Citation

Horner, Donald R. Operating Systems: Concepts and Applications. Scott, Foresman, 1989.