Berry, C. (2011). The sustainable procurement guide: Procuring sustainably using BS 8903. BSi.
芝加哥风格引文Berry, Cathy. The Sustainable Procurement Guide: Procuring Sustainably Using BS 8903. London: BSi, 2011.
MLA引文Berry, Cathy. The Sustainable Procurement Guide: Procuring Sustainably Using BS 8903. BSi, 2011.
警告：这些引文格式不一定是100％准确.