Granin, D., & WID. (1955). Bahnbrecher. Dietz.
Cita Chicago (17th ed.)Granin, Daniil, i WID. Bahnbrecher. Berlin: Dietz, 1955.
Cita MLA (8th ed.)Granin, Daniil, i WID. Bahnbrecher. Dietz, 1955.
Atenció: Aquestes cites poden no estar 100% correctes.