APA (7th ed.) Citation

Gottfried, v. S., Thomas, & Hatto, A. T. (1960). Tristan. Penguin Books.

Chicago Style (17th ed.) Citation

Gottfried, von Strassburg, Thomas, and A. T. Hatto. Tristan. Baltimore: Penguin Books, 1960.

MLA (9th ed.) Citation

Gottfried, von Strassburg, et al. Tristan. Penguin Books, 1960.