Cita APA (7th ed.)

Peterson's (Firm) & University Continuing Education Association. (1996). Peterson's distance learning, 1997. Peterson's.

Cita Chicago (17th ed.)

Peterson's (Firm) i University Continuing Education Association. Peterson's Distance Learning, 1997. Princeton, N. J: Peterson's, 1996.

Cita MLA (9th ed.)

Peterson's (Firm) i University Continuing Education Association. Peterson's Distance Learning, 1997. Peterson's, 1996.