APA (7th ed.) Citation

Vonnegut, K. (2013). Letters (1. publ. in Great Britain.). Vintage Books.

Chicago Style (17th ed.) Citation

Vonnegut, Kurt. Letters. 1. publ. in Great Britain. London: Vintage Books, 2013.

MLA (9th ed.) Citation

Vonnegut, Kurt. Letters. 1. publ. in Great Britain. Vintage Books, 2013.

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