Tonnies, Ferdinand
Routledge and Paul, 1955
Buku Teks
Loomis, Charles P., author
D Van Nostrand , 1965
Buku Teks
Loomis, Charles P.
Prentice Hall Inc., 1957
Buku Teks
Murdock, George Peter, author
Macmillan, 1960
Buku Teks
Merton, Robert K., author
Free Press, 1957
Buku Teks