Fritsch, F.E., author
Vikas, 1979
Buku Teks
Bold, Harold Charles, 1909-, author
Prentice-Hall, 1976
Buku Teks
Bold, Harold Charles, 1909-, author
Prentice-Hall, 1985
Buku Referensi
Pickett-Heaps, Jeremy D., author
Sinaur Associates, 1975
Buku Teks
Graham, Linda E., author
Prentice-Hall, 2000
Buku Teks