Lua APA (7ú heag.)

Ahrens, C., & Seyfarth, L. (2010). Frank Gerritz: Invitionals, auctions.

Lua i Stíl Chicago (17ú heag.)

Ahrens, Carsten, agus Ludwig Seyfarth. Frank Gerritz: Invitionals, Auctions. Bremen, 2010.

Lua MLA (8ú heag.)

Ahrens, Carsten, agus Ludwig Seyfarth. Frank Gerritz: Invitionals, Auctions. 2010.

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