Gaya APA

Elliso, P, T., Barry, , R, E. (2007). Business English for the 21st century (4th ed.). Jakarta: Pearson Prentice Hall.

Gaya MLA

Elliso, Pat, Taylor., Barry, , Robert, E.. "Business English for the 21st century". 4th ed. Jakarta: Pearson Prentice Hall, 2007. Text.