International Consortium on Research in Science and Mathematics Education [3° : 1991 : Mérida, Yucatán]. (1991). Ponencias. [ s.n.].
Cita Chicago (17th ed.)International Consortium on Research in Science and Mathematics Education [3° : 1991 : Mérida, Yucatán]. Ponencias. Yucatán, México: [ s.n.], 1991.
Cita MLA (9th ed.)International Consortium on Research in Science and Mathematics Education [3° : 1991 : Mérida, Yucatán]. Ponencias. [ s.n.], 1991.
Atenció: Aquestes cites poden no estar 100% correctes.