APA (7th ed.) Citation

Strassburg, G. v., Thomas, & Hatto, A. T. (1960). Tristan. Penguin Books.

Chicago Style (17th ed.) Citation

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

MLA (9th ed.) Citation

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