Likins, Peter W.
McGraw-Hill Kogakusha, 1973
Buku Teks
Blau, Peter M., author
Routledge & Kegan Paul, 1966
Buku Teks
Hess, Beth B.
Macmillan Publishing Company, 1985
Buku Teks
Blau, Peter M., author
Random House, 1971
Buku Teks
Blau, Peter M., author
Routledge & Kegan Paul, 1963
Buku Teks