APA (7th ed.) Citation

Gaspar, E. Un problema. P. Aguilar.

Chicago Style (17th ed.) Citation

Gaspar, Enrique. Un Problema. Valencia: P. Aguilar.

MLA (9th ed.) Citation

Gaspar, Enrique. Un Problema. P. Aguilar.

Warning: These citations may not always be 100% accurate.