APA (7th ed.) Citation

Trueba, A. d., & Gill, H. J. (2013). The Cid Campeador A Historical Romance. Project Gutenberg.

Chicago Style (17th ed.) Citation

Trueba, António de, and Henry J. Gill. The Cid Campeador A Historical Romance. Project Gutenberg, 2013.

MLA (9th ed.) Citation

Trueba, António de, and Henry J. Gill. The Cid Campeador A Historical Romance. Project Gutenberg, 2013.

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