Clamp, Cynthia G. L.
Sage, 1999
Buku Teks
Klemstine, Charles F.
Garland Publishing, 1984
Buku Teks
Nisonger, Thomas E.
Libraries Unlimited, 2003
Buku Teks
Nisonger, Thomas E.
Libraries Unlimited, 1992
Buku Referensi
Hall, John W.
University of Michigan Press, 1954
Buku Teks