Ackerman, Nathan W.
Basic Books, 1972
Buku Teks
Carroll, Stephen
Dorling Kindersley , 1992
Buku Referensi
Hardinge, Mervyn G., author
Indonesia Publishing House, 2003
Buku Teks
Hanson, Shirley May Harmon, author
F.A. Davis , 1996
Buku Teks
F. A. Davis , 1996
Buku Teks