Sapsford, R., & Jupp, V. (1996). Data collection and analysis. London: Sage in association with Open University.
استشهاد بنمط شيكاغوSapsford, Roger., and Victor Jupp. Data Collection and Analysis. London: Sage in association with Open University, 1996.
MLA استشهادSapsford, Roger., and Victor Jupp. Data Collection and Analysis. London: Sage in association with Open University, 1996.
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.