National Institute of Agricultural Botany (Cambridge, Eng.). (1974). National scheme for comprehensive certification of herbage seeds: Standards ([Revised ed.].). N.I.A.B..
芝加哥风格引文National Institute of Agricultural Botany (Cambridge, Eng.). National Scheme for Comprehensive Certification of Herbage Seeds: Standards. [Revised ed.]. Cambridge: N.I.A.B., 1974.
MLA引文National Institute of Agricultural Botany (Cambridge, Eng.). National Scheme for Comprehensive Certification of Herbage Seeds: Standards. [Revised ed.]. N.I.A.B., 1974.
警告：这些引文格式不一定是100％准确.