Wynar, Bohdan S.
Libraries Unlimited, Inc., 1967
Buku Teks
Beaty, Wayne H., editor
McGraw-Hill Publishing Company, 1990
Buku Referensi
Bryant, David
Connecticut Library Professional, 1987
Buku Teks
Hall, John W.
University of Michigan Press, 1954
Buku Teks
Dyer, Esther R.
Gale Information Guide Library, 1981
Buku Referensi