Merriam-Webster, 1986
Buku Referensi
Albert, Loy Morehead, editors
New American Library, 1972
Buku Referensi
The Commercial Press, 1938
Buku Referensi
Laird, Charlton Grant, 1901-, author
Simon and Schuster, 1985
Buku Referensi
Merriam-Webster, 2000
Buku Referensi