Cita APA (7a ed.)

Calingaert, P. (1982). Operating system elements: A user perspective. [S.n.].

Cita Chicago Style (17a ed.)

Calingaert, Peter. Operating System Elements: A User Perspective. Englewood Cliffs: [S.n.], 1982.

Cita MLA (9a ed.)

Calingaert, Peter. Operating System Elements: A User Perspective. [S.n.], 1982.