APA

Topham D. W., . (1990). A system V guide to UNIX and XENIX. New York: Springer.

Chicago

Topham Douglas W, . 1990. A system V guide to UNIX and XENIX. New York: Springer.

Harvard

Topham D. W., . (1990). A system V guide to UNIX and XENIX. New York: Springer.

MLA

Topham Douglas W, . A system V guide to UNIX and XENIX. New York: Springer. 1990.