Sapsford, R., & Jupp, V. (1996). Data collection and analysis. Sage.
Citación estilo ChicagoSapsford, Roger, and Victor Jupp. Data Collection and Analysis. London: Sage, 1996.
Cita MLASapsford, Roger, and Victor Jupp. Data Collection and Analysis. Sage, 1996.
Warning: These citations may not always be 100% accurate.