Spellman, F. R., & Drinan, J. E. (2001). The handbook for waterworks operator certification. Technomic.
芝加哥风格引文Spellman, Frank R., 与 Joanne E. Drinan. The Handbook for Waterworks Operator Certification. Lancaster, Penn: Technomic, 2001.
MLA引文Spellman, Frank R., 与 Joanne E. Drinan. The Handbook for Waterworks Operator Certification. Technomic, 2001.
警告：这些引文格式不一定是100％准确.