Cita APA (7a ed.)
Barker, D., & Ott, M. (1990). Using harvard graphics for business presentations (1.vyd.). Boyd and Fraser Publishing Company.
Cita Chicago Style (17a ed.)
Barker, Donald, y Melvin Ott. Using Harvard Graphics for Business Presentations. 1.vyd. Boston: Boyd and Fraser Publishing Company, 1990.
Cita MLA (9a ed.)
Barker, Donald, y Melvin Ott. Using Harvard Graphics for Business Presentations. 1.vyd. Boyd and Fraser Publishing Company, 1990.
Precaución: Estas citas no son 100% exactas.