Cypres, L. (1999). Let's speak business English: A practical guide for the speaker for a foreign language. Barron's Educational Series.
Lua i Stíl Chicago (17ú heag.)Cypres, Linda. Let's Speak Business English: A Practical Guide for the Speaker for a Foreign Language. Hauppauge, NY: Barron's Educational Series, 1999.
Lua MLA (8ú heag.)Cypres, Linda. Let's Speak Business English: A Practical Guide for the Speaker for a Foreign Language. Barron's Educational Series, 1999.
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