E. David Ford, author
Cambridge University Press, 2000
eBooks
Beach, David P., author
Prentice-Hall, 1992
Buku Referensi
Green, Paul E., author
Prentice-Hall, 1970
Buku Teks
Miller, David W., author
Prentice-Hall of India, 1973
Buku Teks
Miller, David W., author
Prentice-Hall, 1960
Buku Teks