Cita APA (7th ed.)

Parmerlee, D. (1993). Selecting the right products and services. NTC Business Books.

Cita Chicago (17th ed.)

Parmerlee, David. Selecting the Right Products and Services. Lincolnwood, Ill: NTC Business Books, 1993.

Cita MLA (9th ed.)

Parmerlee, David. Selecting the Right Products and Services. NTC Business Books, 1993.