Cita APA (7th ed.)

Duffy, T. (1993). Tool kit DOS 5.0. Wadsworth.

Cita Chicago (17th ed.)

Duffy, Tim. Tool Kit DOS 5.0. Belmont: Wadsworth, 1993.

Cita MLA (9th ed.)

Duffy, Tim. Tool Kit DOS 5.0. Wadsworth, 1993.