Cita APA (7a ed.)

Olson, J. F. (2009). Writing skills success in 20 minutes a day (4th ed.). LearningExpress.

Cita Chicago Style (17a ed.)

Olson, Judith F. Writing Skills Success in 20 Minutes a Day. 4th ed. New York, NY: LearningExpress, 2009.

Cita MLA (8a ed.)

Olson, Judith F. Writing Skills Success in 20 Minutes a Day. 4th ed. LearningExpress, 2009.

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