Montgomery, Douglas C.
Gadjah Mada University Press, 1990
Buku Teks SO
Cowden, Dudley J.
Prentice-Hall, 1957
Buku Teks SO
Grant, Eugene Lodewick
McGraw-Hill , 1964
Buku Teks SO
Schrock, Edward M.
Reinhold, 1961
Buku Teks SO
Grant, Eugene Lodewick
McGraw-Hill, 1952
Buku Teks SO