Granin, D. (1956). Bahnbrecher. Kultur & Fortschritt.
Cita Chicago (17th ed.)Granin, Daniil. Bahnbrecher. Berlin: Kultur & Fortschritt, 1956.
Cita MLA (8th ed.)Granin, Daniil. Bahnbrecher. Kultur & Fortschritt, 1956.
Atenció: Aquestes cites poden no estar 100% correctes.