Cita APA (7a ed.)

Campbell, M. (1991). Harvard graphics a su alcance. McGraw-Hill.

Cita Chicago Style (17a ed.)

Campbell, Mary. Harvard Graphics a Su Alcance. Madrid: McGraw-Hill, 1991.

Cita MLA (9a ed.)

Campbell, Mary. Harvard Graphics a Su Alcance. McGraw-Hill, 1991.