Southwick, Charles H.
D. Van Nostrand, 1972
Buku Teks
Etherington, John R.
John Wiley & Sons, 1982
Buku Teks
edited by Joan Hardjono
Oxford University Press, 1991
Buku Teks
edited by Joan Hardjono
Oxford University Press, 1991
Buku Teks
Etherington, John R.
John Wiley & Sons, 1975
Buku Teks