London, 3. U. o. (19). General Certificate of Education Examination: Ordinary level chemistry 2 (Nuffield). London.
芝加哥风格引文London, 3891 University of. General Certificate of Education Examination: Ordinary Level Chemistry 2 (Nuffield). London, 19.
MLA引文London, 3891 University of. General Certificate of Education Examination: Ordinary Level Chemistry 2 (Nuffield). London, 19.
警告：这些引文格式不一定是100％准确.