Citazione APA

LearningExpress (Organization). (2007). Business writing clear and simple. New York: LearningExpress.

Stile di citazione Chicago

LearningExpress (Organization). Business Writing Clear and Simple. New York: LearningExpress, 2007.

Citazione MLA

LearningExpress (Organization). Business Writing Clear and Simple. New York: LearningExpress, 2007.

Attenzione: Queste citazioni potrebbero non essere precise al 100%.