Engel, H. (1964). The solo concert: By / von Hans Engel. Arno Volk / Laaberverl..
Cita Chicago (17th ed.)Engel, Hans. The Solo Concert: By / Von Hans Engel. Köln / Laaber: Arno Volk / Laaberverl., 1964.
Cita MLA (8th ed.)Engel, Hans. The Solo Concert: By / Von Hans Engel. Arno Volk / Laaberverl., 1964.
Atenció: Aquestes cites poden no estar 100% correctes.