Gebhardt, M. (1960). hallo, sportfreunde! (1.-50. Tausend.). Kongress-Verlag.
Cita Chicago (17th ed.)Gebhardt, Manfred. Hallo, Sportfreunde! 1.-50. Tausend. Berlin: Kongress-Verlag, 1960.
Cita MLA (8th ed.)Gebhardt, Manfred. Hallo, Sportfreunde! 1.-50. Tausend. Kongress-Verlag, 1960.
Atenció: Aquestes cites poden no estar 100% correctes.