Powell M. Mark. (1999). Presenting in English: How to give successful presentations. LTP Business, 1999.
Chicago-referens (17:e uppl.)Powell M. Mark. Presenting in English: How to Give Successful Presentations. LTP Business, 1999, 1999.
MLA-referens (9:e uppl.)Powell M. Mark. Presenting in English: How to Give Successful Presentations. LTP Business, 1999, 1999.
Varning: dessa hänvisningar är inte alltid fullständigt riktiga.