Raymond H. Shove ... [and others]
University of Minnesota Press, 1963
Buku Teks
Gates, Jean Key
McGraw-Hill, 1994
Buku Referensi
Chamberlin, Marry W.
American Library Association, 1959
Buku Referensi
Ellis, Estelle
Thames and Hudson, 1998
Buku Referensi
Bland, Mark
UK Chichester, U.K. Wiley-Blackwell, 2013
Buku Teks