APA citiranje

Guffey, M. E., & Mary Ellen Guffey; Carolyn M. Seefer. Business English. Mason, Ohio: Thomson/South-Western.

Trích dẫn kiểu Chicago

Guffey, Mary Ellen, và Mary Ellen Guffey; Carolyn M. Seefer. Business English. Mason, Ohio: Thomson/South-Western.

MLA citiranje

Guffey, Mary Ellen, và Mary Ellen Guffey; Carolyn M. Seefer. Business English. Mason, Ohio: Thomson/South-Western.