APA (7th ed.) Citation

Smith, B. (1990). UNIX step-by-step (1. ed., 1. pr.). Sams.

Chicago Style (17th ed.) Citation

Smith, Ben. UNIX Step-by-step. 1. ed., 1. pr. Carmel, IN: Sams, 1990.

MLA (9th ed.) Citation

Smith, Ben. UNIX Step-by-step. 1. ed., 1. pr. Sams, 1990.