Gaya APA
Dubinko, S., Koledenkova, L.
(1998).
Practice Your Business English
(
2)
.
Estonia:
Tallinn.
Gaya MLA
Dubinko, Svetlana., Koledenkova, Ludmila.
"Practice Your Business English".
2
Estonia:
Tallinn,
1998.
Buku Pend. Bahasa Inggris.