Taubman, Paul, 1939-, author
McGraw-Hill, 1974
Buku Teks
Gunawan, author
Jurnal Teknologi Industri dan Informasi, 2001
Artikel Jurnal
UNESCO, 1978
Buku Teks
Ministry of Education, 1994
Buku Teks
Gordon, Robert Aaron, author
Columbia University Press, 1959
Buku Teks