Thompson, Kenrick S., author
McGraw-Hill , 1994
Buku Teks
Harvey, Lee, author
Macmillan, 1993
Buku Teks
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