HUBBARD RON L. (2001). SOLUTIONS FOR DANGEROUS ENVIRONMENT. NEW ERA PUB. CO. LTD.
芝加哥风格引文HUBBARD RON L. SOLUTIONS FOR DANGEROUS ENVIRONMENT. SMEDLAND: NEW ERA PUB. CO. LTD, 2001.
MLA引文HUBBARD RON L. SOLUTIONS FOR DANGEROUS ENVIRONMENT. NEW ERA PUB. CO. LTD, 2001.
警告：这些引文格式不一定是100％准确.