Galt, Anthony H.
John Wiley & Sons, 1976
Buku Teks
Aldine publishing, 1974
Buku Teks
Blalock, Hubert M., author
Sage Publications, 1982
Buku Teks
Brown, Robert R.
Aldine Pub. Co., 1963
Buku Teks
Berg, Bruce L. (Bruce Lawrence), 1954-, author
Pearson, 2004
Buku Teks