Dignen, B. (2007). Fifty ways to improve your presentation skills in english without too much effort. Orient Blackswan.
استشهاد بنمط شيكاغوDignen, Bob. Fifty Ways to Improve Your Presentation Skills in English Without Too Much Effort. Hyderabad: Orient Blackswan, 2007.
MLA استشهادDignen, Bob. Fifty Ways to Improve Your Presentation Skills in English Without Too Much Effort. Orient Blackswan, 2007.
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.