Gaya APA
Ishak, D, D. (2001).
Communicative English for SMK 1 Edisi Kedua Business and Management .
Jakarta:
Yudhistira.
Gaya MLA
Ishak, Drs., Darwis.
"Communicative English for SMK 1 Edisi Kedua Business and Management".
Jakarta:
Yudhistira,
2001.
Text.