APA (7th ed.) Citation

Gerald von Wales & Gerald von Wales. (1885). Opera: 13.Speculum ecclesiae.

Chicago Style (17th ed.) Citation

Gerald von Wales and Gerald von Wales. Opera: 13.Speculum Ecclesiae. 1885.

MLA (9th ed.) Citation

Gerald von Wales and Gerald von Wales. Opera: 13.Speculum Ecclesiae. 1885.

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