Orr, F. (1997). How to succed at part-time study. St Leonards NSW: Allen and Unwin.
استشهاد بنمط شيكاغوOrr, Fred. How to Succed At Part-time Study. St Leonards NSW: Allen and Unwin, 1997.
MLA استشهادOrr, Fred. How to Succed At Part-time Study. St Leonards NSW: Allen and Unwin, 1997.
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.