Citazione Stile APA (7a Edizione)

Berry, C. (2011). The sustainable procurement guide: Procuring sustainably using BS 8903. BSi.

Citazione stile Chigago Style (17a edizione)

Berry, Cathy. The Sustainable Procurement Guide: Procuring Sustainably Using BS 8903. London: BSi, 2011.

Citatione MLA (8a ed.)

Berry, Cathy. The Sustainable Procurement Guide: Procuring Sustainably Using BS 8903. BSi, 2011.