Pearson, C. Getting down to business in english. Students' book.
Chicago-viite (17. p.)Pearson, Christopher. Getting Down to Business in English. Students' Book.
MLA-viite (8. p.)Pearson, Christopher. Getting Down to Business in English. Students' Book.
Varoitus: Nämä viitteet eivät aina ole täysin luotettavia.