APA Style
Trappe, T., Tullis, G. (2006).
Intelligent Business : Intermediate Business English. (Coursebook) .
England:
Pearson Longman (JP).
MLA Style
Trappe, Tonya., Tullis, Graham.
"Intelligent Business : Intermediate Business English. (Coursebook)".
England:
Pearson Longman (JP),
2006.
Text.