Gaya APA
Powell, M. (2010).
In company: Upper-Intermediate Student's Book. Second Edition (With CD-ROM) (Ed.Ke-2).
Oxford:
Macmillan.
Gaya MLA
Powell, Mark.
"In company: Upper-Intermediate Student's Book. Second Edition (With CD-ROM)".
Ed.Ke-2
Oxford:
Macmillan,
2010.
Textbook.