APA (7th ed.) Citation

Blackwell, J., Thomas, J., & Jones, S. M. (2005). Gwaith Alun. Project Gutenberg.

Chicago Style (17th ed.) Citation

Blackwell, John, John Thomas, and Samuel Maurice Jones. Gwaith Alun. Project Gutenberg, 2005.

MLA (9th ed.) Citation

Blackwell, John, et al. Gwaith Alun. Project Gutenberg, 2005.

Warning: These citations may not always be 100% accurate.