Was heisst Denken?

MLA

Heidegger, Martin. Was Heisst Denken?. 2nd ed. Tübingen: Niemeyer, 1961.

APA

Heidegger, M. (1961). Was heisst Denken?. 2nd ed. Tübingen: Niemeyer.

Chicago

Heidegger, Martin Was Heisst Denken?. 2nd ed. Tübingen: Niemeyer, 1961.