Dyfyniad APA

Valenzuela Arce, N., & Álvarez Martínez, G. (2013). Historical Echoes of Teaching English in Primary School in Costa Rica PPEIEP: 1979-1987.

Dyfyniad Arddull Chicago

Valenzuela Arce, Nandayure, y Gustavo Álvarez Martínez. Historical Echoes of Teaching English in Primary School in Costa Rica PPEIEP: 1979-1987. 2013.

Dyfyniad MLA

Valenzuela Arce, Nandayure, y Gustavo Álvarez Martínez. Historical Echoes of Teaching English in Primary School in Costa Rica PPEIEP: 1979-1987. 2013.

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