(1981). HAP Grieshaber: 1909-1981.
Cita Chicago (17th ed.)HAP Grieshaber: 1909-1981. Stuttgart, 1981.
Cita MLA (8th ed.)HAP Grieshaber: 1909-1981. 1981.
Atenció: Aquestes cites poden no estar 100% correctes.
(1981). HAP Grieshaber: 1909-1981.
Cita Chicago (17th ed.)HAP Grieshaber: 1909-1981. Stuttgart, 1981.
Cita MLA (8th ed.)HAP Grieshaber: 1909-1981. 1981.