Dowling, Tim, 1963-, author
Fourth Estate, 2015
Buku Teks
Partow, Donna
Zondervan Publishing house, 1998
Buku Teks
Schofield, Alan
Gower Press , 1977
Buku Teks
Husband, T. M
McGrw-Hill, 1976
Buku Teks
Tierney, Kevin, author
Oceana Publication, 1971
Buku Teks