Edworthy, Niall, author
Transworls Publishers, 2010
Buku Referensi
Australian Medicines Handbook, 2002
Buku Referensi
Kuther, Tara L., editor
Wardworth, 2012
Buku Referensi
Shell Bitumen U.K., 1990
Buku Referensi
Hanlon, Joseph F., author
McgGraw-Hill Book Company, 1971
Buku Referensi