Hahn, D. B., Payne, W. A., & Mauer, E. (2009). Focus on health (9th ed.). McGraw-Hill.
芝加哥风格引文Hahn, Dale B., Wayne A. Payne, 与 Ellen Mauer. Focus on Health. 9th ed. Boston: McGraw-Hill, 2009.
MLA引文Hahn, Dale B., et al. Focus on Health. 9th ed. McGraw-Hill, 2009.
警告：这些引文格式不一定是100％准确.