Cita APA (7a ed.)
Penn, B. (2004). Be your own PR expert (2nd ed.). Thomson Learning.
Cita Chicago Style (17a ed.)
Penn, Bill. Be Your Own PR Expert. 2nd ed. Australia: Thomson Learning, 2004.
Cita MLA (9a ed.)
Penn, Bill. Be Your Own PR Expert. 2nd ed. Thomson Learning, 2004.
Precaución: Estas citas no son 100% exactas.