White, Roderick, author
McGraw-Hill, 1993
Buku Teks
Green, James H., author
McGraw-Hill, 1984
Buku Teks
Martin, Gary, author
Prentice-Hall, 1988
Buku Teks
Stokes, Jane, author
Bentang, 2003
Buku Teks
Stokes, Jane, author
Sage Publications , 2003
Buku Teks