edited by W.R. Sharp, D.A Evans, P.V. Ammirato, Y. Yamada
Macmillan, 1984
Buku Referensi
edited by David A. Evans [and others]
Macmillan, 1986
Buku Referensi
Narayanaswamy, S.
Tata McGraw-Hill, 1994
Buku Teks
Kohan, Anthony Lawrence.
McGraw-Hill, 1995
Buku Referensi
Westcott, Cynthia
D. Van Nostrand, 1955
Buku Referensi