Cita APA (7a ed.)

Feil, O., & Winkeler, L. (1951). Leo Winkeler.

Cita Chicago Style (17a ed.)

Feil, Otto, y Leo Winkeler. Leo Winkeler. [S. l, 1951.

Cita MLA (9a ed.)

Feil, Otto, y Leo Winkeler. Leo Winkeler. 1951.