Johnson, Debra, author
Routledge, Taylor & Francis group, 2003
Buku Teks
Johnson, Sidney M., author
McGraw-Hill, 1968
Buku Teks
Johson, Jean
Bedford Books, 1987
Buku Teks
Roca, Iggy
Blackwall, 1999
Buku Teks
Johnson, Walter Curtis, 1913-
McGraw-Hill , 1950
Buku Teks