Philby, H. ST. John
Ernest Benn Limited, 1955
Buku Teks
Page, Bruce, author
Doubleday & Company, Inc., Garden City,, 1968
Buku Teks
John, Robert St
Time Incorporated, 1962
Buku Teks
Pomeroy, John H.
Holt, Rinehart and Winston, 1964
Buku Teks
Peter Peregrinus Ltd. on behalf of the Institution of Electrical Engineers, 1992
Buku Teks