edited by S.E. Jorgensen, B. Halling-Sorensen, S.N. Nielsen
Lewis Publishers, 1996
Buku Referensi
Withers, Philip C.
Oxford University Press, 2016
eBooks
edited by J. Rozema and J.A.C. Verkleij
Kluwer Academic, 1991
Buku Teks SO
Jarvis, Peter J.
Prentice-Hall, 2000
Buku Teks SO
Myers, Wayne L.
John Wiley & Sons, 1980
Buku Teks SO