Lovelock, Christopher H., author
Prentice-Hall, 1960
Buku Teks
Zeithaml, Valarie A., author
The McGraw-Hill , 1996
Buku Teks
Baldwin, David A. (David Allen), author
Libraries Unlimited, 2003
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Breen, George Edward, 1911-, author
McGraw-Hill , 1982
Buku Teks
Ranganathan, S.R.
Sarada Ranganathan Endowment for Library Science, 1992
Buku Referensi