Gaya APA

Curtin, D, P. (1991). Lotus 1-2-3 Release 2.2 A Complete Course . Amerika: Prentice-Hall, Inc.

Gaya MLA

Curtin, Dennis, P.. "Lotus 1-2-3 Release 2.2 A Complete Course". Amerika: Prentice-Hall, Inc, 1991. Text.