Authorised guide to the tower of London
London His Majesty's Stationery Office 1935
 Buku Teks
Nicholson, Robert
London arts and cultural guide
Robert Nicholson Pub., 1988
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Kanter, Jerome
Management guide to computer system selection and use
Prentice-Hall, 1970
 Buku Teks
Perry, William E.
Computer control and security : a guide for managers and system analysists
John Wiley & Sons, 1981
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Saunders, Ann
The art and architecture of London : an illustrated guide
Phaidon, 1984
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