Paragon Book Reprint Corp., 1965
Buku Teks
Marcel Dekker, 1982
Buku Referensi
Amerasinghe, Anthony Ranjit Bevis, author
Lake House Investments, 1971
Buku Teks
Kearney, Robert N.
Cornell University Press, 1973
Buku Teks
edited by C.H. Philips
Oxford University Press, 1961
Buku Teks