Ludwig, Gunter
Pergamon Press, 1968
Buku Teks SO
Baldock, G.R.
Ellis Horwood, 1981
Buku Teks SO
Gombas, Pal
Pergamon Press, 1973
Buku Teks SO
Sears, Francis Weston, 1898-1975
Addison-Wesley, 1962
Buku Teks SO
Sears, Francis Weston, 1898-1975
Addison- Wesley, 1950
Buku Teks SO