Cita APA (7a ed.)

Heidegger, M., Jaspers, K., Biemel, W., & Saner, H. (1990). Briefwechsel 1920-1963. Vittorio Klostermann [etc.].

Cita Chicago Style (17a ed.)

Heidegger, Martin, Karl Jaspers, Walter Biemel, y Hans Saner. Briefwechsel 1920-1963. Frankfurt am Main [etc.]: Vittorio Klostermann [etc.], 1990.

Cita MLA (9a ed.)

Heidegger, Martin, et al. Briefwechsel 1920-1963. Vittorio Klostermann [etc.], 1990.