Levitt, R., & Harrison, G. (2006). Berlin: [your gay travel companion] / [written and updated by Ryan Levitt. Original photography by Gavin Harrison] (2. Auflage.). Thomas Cook.
Chicago-referens (17:e uppl.)Levitt, Ryan, och Gavin Harrison. Berlin: [your Gay Travel Companion] / [written and Updated by Ryan Levitt. Original Photography by Gavin Harrison]. 2. Auflage. Peterborough: Thomas Cook, 2006.
MLA-referens (8:e uppl.)Levitt, Ryan, och Gavin Harrison. Berlin: [your Gay Travel Companion] / [written and Updated by Ryan Levitt. Original Photography by Gavin Harrison]. 2. Auflage. Thomas Cook, 2006.
Varning: dessa hänvisningar är inte alltid fullständigt riktiga.