Nash, William A., author
McGraw-Hill, 1972
Buku Teks
Edward Elgar , 1996
Buku Teks
Gear, C. William (Charles William), 1935-, author
Prentice-Hall, 1971
Buku Teks
Modupe, Prince
Harcourt Brace , 1957
Buku Teks
Malinowski, Bronislaw, 1884-1942, author
Routledge & Kegan Paul, 1949
Buku Teks