Withers, Philip C.
Oxford University Press, 2016
eBooks
Jarvis, Peter J.
Prentice-Hall, 2000
Buku Teks
edited by J. Rozema and J.A.C. Verkleij
Kluwer Academic , 1991
Buku Teks
edited by S.E. Jorgensen, B. Halling-Sorensen, S.N. Nielsen
Lewis Publishers, 1996
Buku Referensi
Gottlieb, Roger S.
Cambridge University Press, 2019
Buku Teks