Artikel Jurnal
Mockler, Robert
Prentice-Hall, 1989
Buku Teks
Davis, Randall, author
Addison-Wesley, 1987
Buku Teks
Davis, Randall, author
Addison-Wesley, 1987
Buku Teks
Havelock, Ronald G., author
Center for Research on Utilization of Scientific Knowledge, University of Michigan, 1971
Buku Teks