Khanna, Prem Nath, author
Indian practical civil engineers' handbook
Engineers? Publishers & Advertisers, 1981
 Buku Referensi
The Civil service year book 1989
England. Cabinet Office
Her Majesty's Stationery Office, 1989
 Buku Referensi
The Civil service year book 1988
England. Cabinet Office
Her Majesty's Stationery Office, 1988
 Buku Referensi
Laski, Harold J., author
Reflections on the constitution the House of commons, the cabinet, the civil service
Manchester University Press, 1951
 Buku Teks
Hansen, Karen Lee, author
Civil engineer's handbook of professional practice
John Wiley & Sons, 2011
 Buku Referensi
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