Byrne, J. Richard
Number systems an elementary approach/ J. Richard Byrne
McGraw-Hill , 1967
Buku Teks SO
Yang, Richard
The Chinese world / Richard Yang, Edward J. Lazzerini
The Forum Press, 1978
Buku Teks SO
Economis/ Thomas J. Piere, Richard L. Moss
Addison-Wesley, 1985
Buku Teks SO
Romanek, Richard J.
Introduction to electronic technology / Richard J. Romanek
Prentice-Hall, 1975
Buku Teks
Friederich, Carl J
The Age of power / Carl J. Friederich
Cornell University Press, 1957
Buku Teks SO