Krevelen, D. W. van (Dirk Willem), author
Elsevier, 1976
Buku Teks
edited by A.D. Buckingham, E. Lippert, S. Bratos
John Wiley & Sons, 1978
Buku Teks
Artikel Jurnal
Sienko, Michell J., author
McGraw-Hill, 1974
Buku Teks
Henkel, Daniel P., author
McGraw-Hill , 2002
Buku Teks