The American heritage: dictionary of the English language
editor, William Morris
Houghton Miffiln, 1976
 Buku Referensi
Webster's New World dictionary of the American language
David B. Guralnik, editor in chief
William Collins Publishers, 1976
 Buku Referensi
Webster's new world dictionary of the American language
David B. Guralnik, editor in chief
Prentice-Hall, 1986
 Buku Referensi
Blair, Walter
Native American humor
Chandler, 1960
 Buku Teks
Silverman, William A.
Human experimentation: a guide step into the unknown
Oxford University Press, 1985
 Buku Teks