APA aipamena

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

Chicago Style aipamena

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

MLA aipamena

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

Kontuz: berrikusi erreferentzia hauek erabili aurretik.