Young, E.C.
The penguin dictionary of electronics
Penguin Books, 1988
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Palmer, Alan
The new Penguin dictionary of modern history, 1789-1945
Penguin Books, 1981
 Buku Referensi
Bannock, G.
The Penguin dictionary of economics
Penguin Books, 1974
 Buku Referensi
Thomas, Merlin
The Penguin French dictionary
Penguin Books, 1985
 Buku Referensi
Bannock, G.
The Penguin dictionary of economics
Allen Lane / The Viking Press, 1979
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