- Author: Lisa Wake, Richard Gray, Frank Bourke, Richard Gray
- Language: English
- Year: 2012
- Author: Sheila Hardy, Richard Gray, Jacqueline White
- Language: English
- Year: 2018
- Author: Nabil Abdel-Fattah Richard Gray Sharon Cullinane
- Language: English
- Year: 2019
- Author: Jeff Hawkins Richard Gray
- Language: English
- Year: 2019
- Author: Edward W. Fasholé-Luke, Richard Gray, Adrian Hastings, Godwin Tasie
- Language: English
- Year: 1978
- Author: Richard Gray
- Language: English
- Year: 2011
- Author: Wight Richard, Gray Richard, Cooke Warren
- Language: English
- Year: 2009
- Author: Richard Gray
- Language: English
- Year: 2012
- Author: Manfred Frank Sabine Wilke Richard Gray
- Language: English
- Year: 1989
- Author: Richard Gray Owen Robinson
- Language: English
- Year: 2004