Companion, Audrey L.
McGraw-Hill, 1979
Buku Teks SO
Ladd, Mark
Ellis Horwood, 1994
Buku Teks SO
edited by Z.B. Maksic
Springer-Verlag, 1990
Buku Teks SO
Nuraini Syarifuddin
Gadjah Mada University Press, 1994
Buku Teks SO
Murrell, John N.
John Wiley & Sons, 1985
Buku Teks SO