Nickerson, C., & Planken, B. C. (2016). Introducing business English. Routledge.
Lua i Stíl Chicago (17ú heag.)Nickerson, Catherine, agus Brigitte Chantal Planken. Introducing Business English. London: Routledge, 2016.
Lua MLA (9ú heag.)Nickerson, Catherine, agus Brigitte Chantal Planken. Introducing Business English. Routledge, 2016.
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