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-viite (17. p.)Levitt, Ryan, ja 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-viite (8. p.)Levitt, Ryan, ja Gavin Harrison. Berlin: [your Gay Travel Companion] / [written and Updated by Ryan Levitt. Original Photography by Gavin Harrison]. 2. Auflage. Thomas Cook, 2006.
Varoitus: Nämä viitteet eivät aina ole täysin luotettavia.