Bland, Mark, author
UK Chichester, U.K. Wiley-Blackwell, 2013
Buku Teks
Girardet, Nikolaus, author
Steiner, 1983
Buku Teks
Buescher, Hartmut, author
Nias Press, 2011
Buku Teks
Chamberlin, Marry W., author
American Library Association, 1959
Buku Referensi
Gates, Jean Key, author
McGraw-Hill, 1974
Buku Referensi