Cochran, William G.
Sampling techniques
John Wiley & Sons, 1953
 Buku Teks SO
Cochran, William G.
Sampling techniques
John Wiley , 1963
 Buku Teks SO
Cochran, William G.
Sampling techniques
Wiley, 1953
 Buku Teks SO
Scheaffer, Richard L.
Survey sampling
Brooks/Cole Cengage Learning, 2012
 Buku Teks SO
Schrock, Edward M.
Quality control and statistical methods
Reinhold, 1961
 Buku Teks SO