John, Robert St
Time Incorporated, 1962
Buku Teks
Page, Bruce
Doubleday & Company, Inc., Garden City,, 1968
Buku Teks
Peter Peregrinus Ltd. on behalf of the Institution of Electrical Engineers, 1992
Buku Teks
Magee, John H.
Richard D. Irwin, 1951
Buku Teks
Barton, John H.
Stanford University Press, 1981
Buku Teks