Roth, J. (2008). The 20% solution: A practical guide to dramatic cost reduction in MROP procurement. Pegasus Books.
芝加哥风格引文Roth, Joel. The 20% Solution: A Practical Guide to Dramatic Cost Reduction in MROP Procurement. Bloomington, IN: Pegasus Books, 2008.
MLA引文Roth, Joel. The 20% Solution: A Practical Guide to Dramatic Cost Reduction in MROP Procurement. Pegasus Books, 2008.
警告：这些引文格式不一定是100％准确.