APA (7th ed.) Citation

Feil, O., Spindelberger, G., & Spindelberger, L. (1953). Ludwig u[nd] Grete Spindelberger zu eigen.

Chicago Style (17th ed.) Citation

Feil, Otto, Grete Spindelberger, and Ludwig Spindelberger. Ludwig U[nd] Grete Spindelberger Zu Eigen. [S.l, 1953.

MLA (9th ed.) Citation

Feil, Otto, et al. Ludwig U[nd] Grete Spindelberger Zu Eigen. 1953.