APA
Das S., . (1996). Unix system V.4 : Concepts & application. New Delhi: T.M.H.
Chicago
Das Sumitabha, . 1996. Unix system V.4 : Concepts & application. New Delhi: T.M.H.
Harvard
Das S., . (1996). Unix system V.4 : Concepts & application. New Delhi: T.M.H.
MLA
Das Sumitabha, . Unix system V.4 : Concepts & application. New Delhi: T.M.H. 1996.