Courant, R., & Robbins, H. (1967). Was ist Mathematik? (2nd ed. 1967.). Berlin, Heidelberg: Springer Berlin Heidelberg.
Chicago Style CitationCourant, Richard, and Herbert Robbins. Was Ist Mathematik? 2nd ed. 1967. Berlin, Heidelberg: Springer Berlin Heidelberg, 1967.
MLA CitationCourant, Richard, and Herbert Robbins. Was Ist Mathematik? 2nd ed. 1967. Berlin, Heidelberg: Springer Berlin Heidelberg, 1967.
Warning: These citations may not always be 100% accurate.