Bibliography Styles Handbook     

MLA Format: Citing computer software

Information for a commercially available program should be cited in the following order: writer of the program (if known), an underlined title of the program, the version of the program, a descriptive label, the distributor and the year of publication. A period follows each item except for a comma which follows the distributor.

Chen, Roger. Visdata. Vers. 1.1. Computer software. Viscal, 1986. IBM PC-DOS 2.0, 256KB, disk.

At the end of the entry, add relevant information such as the operating system the program needs, number of kilobytes and form of the program.