edited by Talcott Parsons
Voice of American, 1968
Buku Teks
edited by F.C. Bartlett
Kegan Paul, Trench, 1946
Buku Teks
MacIver, Robert M., author
Holt, Rinehart and Winston, 1962
Buku Teks
MacIver, Robert M., author
Macmillan, 1953
Buku Teks
Merrill, Francis E. (Francis Ellsworth), 1904-1969, author
Prentice-Hall, 1965
Buku Teks