Feddersen, E., Lüdtke, I., & Braun, H. (2009). Living for the elderly: A design manual. Boston : Birkhäuser.
Čikaški stil citiranja (17. izdanje)Feddersen, Eckhard, Insa Lüdtke, i Helmut Braun. Living for the Elderly: A Design Manual. Basel: Boston : Birkhäuser, 2009.
MLA način citiranja (9. izdanje)Feddersen, Eckhard, et al. Living for the Elderly: A Design Manual. Boston : Birkhäuser, 2009.
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