Cita APA (7th ed.)

Clement, S. (2007). Manual Procura+ (2a ed.). ICLEI, Local Governments for Sustainability : Procura+, Campanya de compra sostenible.

Cita Chicago (17th ed.)

Clement, Simon. Manual Procura+. 2a ed. Barcelona: ICLEI, Local Governments for Sustainability : Procura+, Campanya de compra sostenible, 2007.

Cita MLA (9th ed.)

Clement, Simon. Manual Procura+. 2a ed. ICLEI, Local Governments for Sustainability : Procura+, Campanya de compra sostenible, 2007.