Mayer, Robert R., author
Prentince-Hall, 1980
Buku Teks
Mayer, Robert R.
Prentice-Hall, 1985
Buku Teks
Goode, William J., author
McGraw-Hill, 1952
Buku Teks
Blalock, Hubert M., author
Prentice-Hall, 1970
Buku Teks
Blalock, Hubert M., author
Prentice-Hall, 1982
Buku Teks