APA (7th ed.) Citation

Möbius, E., & Nielsen, N. C. (1947). Ex-Libris N. C. Nielsen.

Chicago Style (17th ed.) Citation

Möbius, E., and N. C. Nielsen. Ex-Libris N. C. Nielsen. [S.l, 1947.

MLA (9th ed.) Citation

Möbius, E., and N. C. Nielsen. Ex-Libris N. C. Nielsen. 1947.

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