- Author: John B Clark, W. Bruce Leslie, Kenneth P. O'Brien, Nancy L. Zimpher
- Language: English
- Year: 2010
- Author: John F. Clark
- Language: English
- Year: 2004
- Author: Stephen W Smith, John Coggon, Clark Hobson, Richard Huxtable, Sheelagh McGuinness, José Miola, Mary Neal (editors)
- Language: English
- Year: 2017
- Author: John P. Clark
- Language: Italian
- Year: 2023
- Author: John C. Clark, Marcus Peter Johnson
- Language: English
- Year: 2021
- Author: John R. Clark
- Language: English
- Year: 2021
- Author: John F. Clark David E. Gardinier
- Language: English
- Year: 2018
- Author: Elisée Reclus John P. Clark (editor)
- Language: Italian
- Year: 2022
- Author: John David Clark Sr.
- Language: English
- Year: 2008