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