APA
Thomas R. &. Y. J., . (1985). A User guide to the UNIX system. Osborne, Berkeley: .
Chicago
Thomas Rebecca & Yates Jean, . 1985. A User guide to the UNIX system. Osborne, Berkeley: .
Harvard
Thomas R. &. Y. J., . (1985). A User guide to the UNIX system. Osborne, Berkeley: .
MLA
Thomas Rebecca & Yates Jean, . A User guide to the UNIX system. Osborne, Berkeley: . 1985.