- Author: John P. Spencer
- Language: English
- Year: 2012
- Author: John P. Spencer
- Language: English
- Year: 2012
- Author: John R. Spencer, Michael E. Lamb (editors)
- Language: English
- Year: 2012
- Author: John W. Spencer
- Language: English
- Author: John H Spencer
- Language: English
- Year: 2012
- Author: Hayek Friedrich August, McCann Charles Robert, Mill John Stuart, Spencer Herbert
- Language: English
- Year: 2004
- Author: James A. Leith Raymond A. Price John H. Spencer (eds.)
- Language: English
- Year: 1995
- Author: John Moore Spencer Sunshine
- Language: English
- Year: 2004