- Author: O. C. Ferrell, Geoffrey Hirt, Linda Ferrell, Geoffrey A. Hirt, Linda Ferrell
- Language: English
- Year: 2021
- Author: O. C. Ferrell Geoffrey A. Hirt Linda Ferrell
- Language: English
- Year: 2022
- Author: O. C. Ferrell, Linda Ferrell, John Fraedrich
- Language: English
- Year: 2019
- Author: O. C. Ferrell Geoffrey Hirt Linda Ferrell
- Language: English
- Year: 2019
- Author: Leonard Bierman O.C. Ferrell and Linda Ferrell
- Language: English
- Year: 2018
- Author: Ferrell Linda, Ferrell O. C., Thorne Debbie M
- Language: English
- Year: 2016
- Author: Ferrell Linda, Ferrell O. C., Thorne Debbie M
- Language: English
- Year: 2017
- Author: O. C. Ferrell, Geoffrey A. Hirt, Linda Ferrell, Gloria María Elizondo González
- Language: Spanish
- Year: 2010
- Author: Linda Ferrell, O. C. Ferrell, Geoffrey A. Hirt
- Language: English
- Year: 2020
- Author: O. C. Ferrell, Linda Ferrell, Geoffrey A. Hirt
- Language: English
- Year: 2016