The Penguin dictionary of mathematics
edited by David Nelson
Penguin Books, 2003
Buku Referensi
Mautner, Thomas
The Penguin dictionary of philosophy
Penguin Book, 2005
Buku Referensi
Fergusson, Rosalind
The penguin rhyming dictionary
Bloomsbury Books, 1985
Buku Referensi
Gunton, Tony
The penguin dictionary of information technology
Penguin Books, 1993
Buku Referensi
Graham, John
The penguin dictionary of telecommunications
Penguin Books, 1983
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