Cita APA (7th ed.)

Duffy, T. (1982). Study guide Business data processing: Brabb-McKean. Houghton Mifflin.

Cita Chicago (17th ed.)

Duffy, Timothy. Study Guide Business Data Processing: Brabb-McKean. Boston: Houghton Mifflin, 1982.

Cita MLA (9th ed.)

Duffy, Timothy. Study Guide Business Data Processing: Brabb-McKean. Houghton Mifflin, 1982.