APA (7th ed.) Citation

Giraldus, C., Brewer, J. S., Dimock, J. F., & Warner, G. F. (1861). Giraldi Cambrensis opera. Longman, & Co. [etc., etc.].

Chicago Style (17th ed.) Citation

Giraldus, Cambrensis, J. S. Brewer, James F. Dimock, and George F. Warner. Giraldi Cambrensis Opera. London: Longman, & Co. [etc., etc.], 1861.

MLA (9th ed.) Citation

Giraldus, Cambrensis, et al. Giraldi Cambrensis Opera. Longman, & Co. [etc., etc.], 1861.