- Author: Pieter Kok
- Language: English
- Author: Pieter Kok
- Language: English
- Year: 2023
- Author: Pieter Kok
- Language: English
- Year: 2023
- Author: Pieter Kok
- Language: English
- Year: 2018
- Author: Pieter Kok
- Language: English
- Author: Pieter Kok
- Language: English
- Year: 2018
- Author: Pieter Kok Brendon W. Lovett
- Language: English
- Year: 2010