editor, William Morris
Houghton Miffiln, 1976
Buku Referensi
Victoria Neufeldt, David B. Guralnik, editor
Webster's New World, 1988
Buku Referensi
Diamond, 2001
Buku Referensi
Eckersley, C. E. (Charles Ewart), 1892-1967
Longmans, Green and Co., 1953
Buku Referensi
edited by Jess Stein
Dell Publishing, 1962
Buku Referensi