Jones, Gareth R., author
Pearson Prentce-Hall, 2007
Buku Teks
Jones, Gareth R., author
Pearson Prentice-Hall, 2013
Buku Teks
Clark, Peter A., author
Tavistock, 1972
Buku Teks
Borkowski, Nancy, author
Jones & Bartlett Learning, 2015
Buku Teks
Gerloff, Edwin A., author
McGraw-Hill, 1985
Buku Teks