Havighurst, Robert J.
Allyn and Bacon, Inc, 1973
Buku Teks
Feather, John
Library Association Publishing , 1996
Buku Teks
Levine, Daniel U.
Allyn and Bacon, 1992
Buku Teks
Daffa Fausta Fidela, author
Fakultas Ilmu Pengetahuan dan Budaya Universitas Indonesia, 2022
UI - Tugas Akhir
New jersey, 2004
Buku Teks