Artikel Jurnal
Bynagle, Hans E.
Libraries Unlimited, 1986
Buku Referensi
Aitchison, Jean, 1938-, author
Unesco, 1977
Buku Referensi
Joreskog, Karl G., author
Scientific Software International Inc., 1996
Buku Teks
Wynar, Christine Gehrt
Libraries Unlimited, 1986
Buku Referensi