International Consortium on Research in Science and Mathematics Education [3° : 1991 : Mérida, Yucatán]. (1991). Ponencias. [ s.n.].
芝加哥风格引文International Consortium on Research in Science and Mathematics Education [3° : 1991 : Mérida, Yucatán]. Ponencias. Yucatán, México: [ s.n.], 1991.
MLA引文International Consortium on Research in Science and Mathematics Education [3° : 1991 : Mérida, Yucatán]. Ponencias. [ s.n.], 1991.
警告：这些引文格式不一定是100％准确.