Cochran, William G., author
John Wiley & Sons, 1959
Buku Teks
edited by David Harrington
Springer, 2012
eBooks
Campbell, Donald T., author
Rand Mc Nally College Publisher, 1966
Buku Teks
Atkinson, A.C., author
Clarendon Press, 1992
Buku Teks
Neter, John, author
Irwin, 1990
Buku Teks