Cita APA (7th ed.)

Zimmermann, R. (2005). Small ideas that work. Bernard van Leer Foundation.

Cita Chicago (17th ed.)

Zimmermann, Robert. Small Ideas That Work. La Haya: Bernard van Leer Foundation, 2005.

Cita MLA (9th ed.)

Zimmermann, Robert. Small Ideas That Work. Bernard van Leer Foundation, 2005.