Cita APA (7a ed.)

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

Cita Chicago Style (17a ed.)

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

Cita MLA (9a ed.)

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