Gaya APA

Jones, C., Doff, A. (1998). Language in use : intermediate self-study workbook / Adrian Doff, Christopher Jones (Cet.6). New York: .

Gaya MLA

Jones, Christopher., Doff, Adrian. "Language in use : intermediate self-study workbook / Adrian Doff, Christopher Jones". Cet.6 New York: , 1998. Textbook.