Merrill, Francis E. (Francis Ellsworth), 1904-1969, author
Prentice-Hall, 1965
Buku Teks
Staples, Robert
McGraw-Hill, 1976
Buku Teks
Inkeles, Alex
Prentice-Hall, 1964
Buku Teks
Staples, Robert
McGraw-Hill , 1976
Buku Teks
Gelles, Richard J., author
McGraw-Hill College , 1999
Buku Teks