Thambynayagam, R.K. Michael
McGraw-Hill, 2011
Buku Referensi
edited by Crispian Scully
Oxford University Press, 2002
Buku Referensi
Kurtz, Max, author
McGraw-Hill, 1991
Buku Referensi
Pressat, Roland
Aldine Publ., 1980
Buku Teks
Pintner, Rudolf, 1884-1942
Henry Holt and Company, [1927]
Buku Teks