Ohio State University: Information about the rules of telephone
etiquette and tips on how to answer the phone in English, screen calls,
transfer calls, place callers on hold etc.
OwlEnglish.Purdue.edu : Purdue Online Writing Lab. This handout provides written examples and information on how to write for a business audience. It includes information on getting to the point, keeping it simple, active and passive voice, non discriminatory language, and verb over generalizing.