APA (7th ed.) Citation

Alcalá Rivera, G. e. a. (1980). Common core. McGraw-Hill.

Chicago Style (17th ed.) Citation

Alcalá Rivera, Guillermo et al. Common Core. México, Distrito Federal: McGraw-Hill, 1980.

MLA (9th ed.) Citation

Alcalá Rivera, Guillermo et al. Common Core. McGraw-Hill, 1980.