Galtung, Johan, author
George Allen and Unwin, 1969
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
Crano, William D., author
Lawrence Erlbaum Assossiate, 2002
Buku Teks