Lua APA (7ú heag.)

Engelhard, G. (1988). Der Kölner Galerist Rolf Ricke. Art.

Lua i Stíl Chicago (17ú heag.)

Engelhard, Günter. "Der Kölner Galerist Rolf Ricke." Art 1988.

Lua MLA (8ú heag.)

Engelhard, Günter. "Der Kölner Galerist Rolf Ricke." Art, 1988.

Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.