Cita APA (7a ed.)

Frick, R. (1982). Designmethodik. o.A..

Cita Chicago Style (17a ed.)

Frick, Rolf. Designmethodik. o.A.: o.A., 1982.

Cita MLA (8a ed.)

Frick, Rolf. Designmethodik. o.A., 1982.