Παραπομπή APA

Dignen, B. (2007). Fifty ways to improve your presentation skills in english without too much effort. Orient Blackswan.

Παραπομπή Chicago Style

Dignen, Bob. Fifty Ways to Improve Your Presentation Skills in English Without Too Much Effort. Hyderabad: Orient Blackswan, 2007.

Παραπομπή MLA

Dignen, Bob. Fifty Ways to Improve Your Presentation Skills in English Without Too Much Effort. Orient Blackswan, 2007.