- Author: T. H. Harter
- Language: German, English
- Year: 1904
- Author: Judy C. Pearson, Paul E. Nelson, Scott Titsworth, Lynn Harter, Jeff Butler, Stephen Ihde, Jim Katt, Burt Pryor
- Language: English
- Year: 2021
- Author: Hélène Harter
- Language: French
- Year: 2017
- Author: Jim Clifton, jim Harter, gallup Institute
- Language: Spanish
- Year: 2020
- Author: André Kaspi Hélène Harter
- Language: Greek
- Year: 2019
- Author: Tom Rath, Jim Harter
- Language: English
- Year: 2010
- Author: Jim Harter
- Language: English
- Year: 2015
- Author: Natan Raylih Aleks Yang Bredli Mek Mayk Kantelon Tim Oksli Mark Harter T. Dzh. Golovaychuk
- Language: Русский
- Year: 2018