Brieger, N. (1989). Early business contacts: Materials for developing listening and speaking skills for students of business English. Prentice Hall International UK.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रBrieger, Nick. Early Business Contacts: Materials for Developing Listening and Speaking Skills for Students of Business English. United Kingdom: Prentice Hall International UK, 1989.
एमएलए (9वां संस्करण) प्रशस्ति पत्रBrieger, Nick. Early Business Contacts: Materials for Developing Listening and Speaking Skills for Students of Business English. Prentice Hall International UK, 1989.
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