Pierce Heather. (2004). Persuasive Proposals and Presentations: 24 Lessons for Writing Winners (In lần thứ 1.). American: McGraw -Hill.
Styl cytowania ChicagoPierce Heather. Persuasive Proposals and Presentations: 24 Lessons for Writing Winners. In lần thứ 1. American: McGraw -Hill, 2004.
Styl cytowania MLAPierce Heather. Persuasive Proposals and Presentations: 24 Lessons for Writing Winners. In lần thứ 1. American: McGraw -Hill, 2004.
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