edited by Peter Bellwood
Wiley Blackwell, 2015
Buku Teks
McNeill, William H.
Prentice-Hall, 1990
Buku Referensi
McKee, Jeffrey K.
Pearson/Prentice Hall, 2005
Buku Teks
Eckhardt, Robert B.
McGraw-Hill, 1979
Buku Teks
Pawson, Ivan G.
John Wiley & Sons, 1977
Buku Teks