U.S. Treasury Department , 1961
Buku Teks
edited by Jean M. fredette
Writers Digest Book, 1990
Buku Referensi
edited by Jean M. Fredette
Writer`s Digest Books, 1988
Buku Teks
Skees, William D.
Lifetime Learning Publications, 1982
Buku Teks
Szuchman, Lenore T., author
Wadsworth, 2014
Buku Teks