Norman S. Susan. (1990). We 're in Business. English for Commercial Practice and International trade: Students Book. London, Longman, 1990.
Čikaški stil citiranja (17. izdanje)Norman S. Susan. We 'Re in Business. English for Commercial Practice and International Trade: Students Book. London, Longman, 1990, 1990.
MLA način citiranja (9. izdanje)Norman S. Susan. We 'Re in Business. English for Commercial Practice and International Trade: Students Book. London, Longman, 1990, 1990.
Upozorenje: Ovi citati možda nisu uvijek 100% točni.