editors, L.T. Morton, S. Godbolt
Butterworth, 1984
Buku Referensi
Ching-Chih, Chen, author
MIT Press, 1977
Buku Teks
Holler, Frederick L., author
ABC-Clio, 1981
Buku Teks
Indonesian Institute of Sciences, 1996
Buku Referensi
Prytherch, Ray, author
Gower, 1987
Buku Referensi