APA (7th ed.) Citation

Ullrich, F. (1991). Gunther Keusen: "... die holunderrote Spur".

Chicago Style (17th ed.) Citation

Ullrich, Ferdinand. Gunther Keusen: "... Die Holunderrote Spur". Recklinghausen, 1991.

MLA (9th ed.) Citation

Ullrich, Ferdinand. Gunther Keusen: "... Die Holunderrote Spur". 1991.

Warning: These citations may not always be 100% accurate.