Cita APA (7a ed.)

Alcalá Rivera, G. (1980). Biological and healt sciences. McGraw-Hill.

Cita Chicago Style (17a ed.)

Alcalá Rivera, Guillermo. Biological and Healt Sciences. México, Distrito Federal: McGraw-Hill, 1980.

Cita MLA (9a ed.)

Alcalá Rivera, Guillermo. Biological and Healt Sciences. McGraw-Hill, 1980.