Dyfyniad APA

International Consortium on Research in Science and Mathematics Education [3° : 1991 : Mérida, Yucatán]. (1991). Ponencias. [ s.n.].

Dyfyniad Arddull Chicago

International Consortium on Research in Science and Mathematics Education [3° : 1991 : Mérida, Yucatán]. Ponencias. Yucatán, México: [ s.n.], 1991.

Dyfyniad MLA

International Consortium on Research in Science and Mathematics Education [3° : 1991 : Mérida, Yucatán]. Ponencias. [ s.n.], 1991.

Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.