Conover, W.J., author
John Wiley & Sons, 1980
Buku Teks
Djarwanto, author
BPFE, 1997
Buku Teks
Desu, M.M., author
Chapman & Hall , 2004
Buku Teks
Siegel, Sidney, author
Gramedia , 1985
Buku Teks
Siebert, Carl F., author
Oxford University Press, 2018
Buku Teks