Fleming, Ian
John Wiley & Sons, 1976
Buku Teks SO
Williams, Dudley H.
McGraw-Hill, 1985
Buku Teks
Fleming, Walter
Prentice-Hall, 1984
Buku Teks SO
Fleming, Walter
Prentice-Hall, 1980
Buku Teks SO
Maurois, A. [Andre]
E.P. Dutton & co., Inc., 1959
Buku Referensi