Cita APA (7a ed.)

Sin autor & International Business Machines Corporation - IBM. (1972). OS sort/merge program (8th ed.). [S.n.].

Cita Chicago Style (17a ed.)

Sin autor y International Business Machines Corporation - IBM. OS Sort/merge Program. 8th ed. Sweden: [S.n.], 1972.

Cita MLA (9a ed.)

Sin autor y International Business Machines Corporation - IBM. OS Sort/merge Program. 8th ed. [S.n.], 1972.