Cita APA (7th ed.)

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

Cita Chicago (17th ed.)

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

Cita MLA (9th ed.)

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