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