APA (7th ed.) Citation

Twain, M., & Beltrán, J. Obras selectas.

Chicago Style (17th ed.) Citation

Twain, Mark, and Jorge Beltrán. Obras Selectas. Barcelona.

MLA (9th ed.) Citation

Twain, Mark, and Jorge Beltrán. Obras Selectas.

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