APA (7th ed.) Citation

Engelmann, P. (1968). Letters from Ludwig Wittgenstein: With a memoir. Horizon Press.

Chicago Style (17th ed.) Citation

Engelmann, Paul. Letters from Ludwig Wittgenstein: With a Memoir. New York: Horizon Press, 1968.

MLA (9th ed.) Citation

Engelmann, Paul. Letters from Ludwig Wittgenstein: With a Memoir. Horizon Press, 1968.

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