
- Author: Jordan B. Peterson, Juan Ruiz Herrero
- Language: Spanish
- Year: 2018

- Author: Manuel Atienza Juan Ruiz Manero
- Language: Spanish
- Year: 1996

- Author: Manuel Atienza Juan Ruiz Manero
- Language: Spanish
- Year: 2000

- Author: Manuel Atienza Juan Ruiz Manero (auth.) Francisco J. Laporta Aleksander Peczenik Frederick Schauer (eds.)
- Language: English
- Year: 1998

- Author: Juan Ruiz Arcipreste de Hita
- Language: Spanish