Labovitz, Sanford, author
McGraw-Hill, 1981
Buku Teks
Blalock, Hubert M., author
Prentice-Hall, 1970
Buku Teks
Blalock, Hubert M., author
Prentice-Hall, 1982
Buku Teks
Weiss, Robert S., author
N.Y. Wiley , 1968
Buku Teks
Goode, William J., author
McGraw-Hill, 1952
Buku Teks