Gaya APA

Feddersen, E, , (., Ludtke, I. (2009). Living for the elderley; a design manual . Basel-Swis: Birkhauser Verlag AG.

Gaya MLA

Feddersen, Eckhard, , (et.al)., Ludtke, Insa. "Living for the elderley; a design manual". Basel-Swis: Birkhauser Verlag AG, 2009. Text.