Leipzig, Walter, editor
Gulf Publishing, 1976
Buku Referensi
Gulf Publishing Company, 1976
Buku Teks
Purdy, G.A., author
Copp Clark, 1958
Buku Teks
Fahim, Mohamed A., author
Elsevier , 2010
Buku Teks
Gary, James H., author
Marcell Dekker, 2007
Buku Teks