Mitchell, Ferd H., author
CRC Press, 2016
Buku Teks
Elcock, Howard, author
Longman, 1991
Buku Teks
Alexander R. Dawoody, editor
Springer, 2015
Buku Teks
Lemay, Michael C., author
Wardsworth, 2006
Buku Teks
Link, Albert N., author
Springer, 2006
Buku Teks