Amidi, A. (2015). Sampling Theory. Tehran: SAMT Pub.
Behboudian, J. (2004). Basic Statistics and Probability. Mashhad: Astan-E Qods Pub.
Groves, R. M. Et Al. (2008). Survey Methodology (Salehi, M. & Jamalzadeh, M. A. Trans.). Tehran: Statistical Research and Training Center.
Saraei, H. (2010). An Introduction to Sampling. Tehran: SAMT Pub.
Shirani, P. (1985). Sampling Theory. Tehran: SAMT Pub.