Gaya APA
Adrian, D., Christoper, J. (1998).
Language in use : pre-intermediate self-study workbook / Adrian Doff, Christoper Jones (Cet.6).
New York:
.
Gaya MLA
Doff, Adrian., Jones, Christoper.
"Language in use : pre-intermediate self-study workbook / Adrian Doff, Christoper Jones".
Cet.6
New York:
,
1998.
Textbook.