Cita APA (7th ed.)
Herwig, O. (2008). Universal design: Solutions for a barrier-free living. Birkhäuser.
Cita Chicago (17th ed.)
Herwig, Oliver. Universal Design: Solutions for a Barrier-free Living. Basel ; Boston: Birkhäuser, 2008.
Cita MLA (9th ed.)
Herwig, Oliver. Universal Design: Solutions for a Barrier-free Living. Birkhäuser, 2008.
Atenció: Aquestes cites poden no estar 100% correctes.