edited by John Wilson Lewis
Stanford University Press, 1974
Buku Teks
Gunther, John, 1901-1970
Hamish Hamilton, 1939
Buku Referensi
Gordon, Stewart, author
Ufuk Press, 2008
Buku Teks
Murphey, Rhoads, author
Harper Collins, 1992
Buku Teks
Tuti Nuriah Erwin
FEUI, 1990
Buku Teks