Johnson, Dave, author
McGraw-Hill, 2003
Buku Teks
Ross, Catherine Sheldrick
Library Association Publishing, 1998
Buku Referensi
Fraley, Ruth A., author
Neal-Schuman Publishers , 1990
Buku Teks
Fakultas Ilmu Pengetahuan dan Budaya Universitas Indonesia, 2012
UI - Skripsi (Open)
Sayers, W.C. Berwick, author
Deutsch, 1967
Buku Teks