Gaya APA

Ober, S, E, A. (2002). Gregg college keyboarding and document processing lessons 1-120 (9). New York: McGraw-Hill Glencoe.

Gaya MLA

Ober, Scot, Et, Al.. "Gregg college keyboarding and document processing lessons 1-120". 9 New York: McGraw-Hill Glencoe, 2002. Text.