Gaya APA
Dubinko, S., Koledenkova, L. (1998).
Practice Your Business Englsih : Practice Book 1 .
Estonia:
TEA Publishers.
Gaya MLA
Dubinko, Svetlana., Koledenkova, Ludmila.
"Practice Your Business Englsih : Practice Book 1".
Estonia:
TEA Publishers,
1998.
Text.