Carrithers, Wallace M.
C.E. Merrill Books, 1967
Buku Teks
Olson, Hope A.
Libraries Unlimited, 2001
Buku Teks
Olson, Hope A.
Libraries Unlimited, 2002
Buku Teks
edited by Simon M. Newman
Spartan , 1965
Buku Teks
Lancaster, F. Wilfrid
John Wiley & Sons, 1979
Buku Teks