Argenti, John, author
Allen & Unwin, 1975
Buku Teks
This, Leslie E.
Addison-Wesley Pub. Co. , 1974
Buku Teks
Condliffe, Peter, author
Lexis lexis, 2012
Buku Teks
Terry, George Robert, author
Learning Systems, 1981
Buku Teks
Young, S. David, author
McGraw-Hill, 2000
Buku Teks