Conway, Ronald, author
Sun Books, 1971
Buku Teks
Central Offece of Information, 1959
Buku Teks
Barnes, Harry Elmer, author
Prentice-Hall, 1950
Buku Teks
M.S. Kaelan, author
Paradigma Press, 2014
Buku Teks
Orlicky, Joseph, author
McGraw-Hill, 1975
Buku Teks