Piddington, Ralph, author
Eidenburgh Oliver , 1960
Buku Teks
Serway, Raymond A., author
Saunders College Publishing, 1990
Buku Teks
Ministry of Justice, 1975
Buku Teks
Hsi-Chen, Wu
Buku Teks
Krom, N.J., author
Gian Publishing House, 1986
Buku Referensi