APA (7th ed.) Citation

Cortina. (1997). Opening doors Understanding college reading. The McGraw Hill companies Inc.

Chicago Style (17th ed.) Citation

Cortina. Opening Doors Understanding College Reading. London: The McGraw Hill companies Inc, 1997.

MLA (9th ed.) Citation

Cortina. Opening Doors Understanding College Reading. The McGraw Hill companies Inc, 1997.

Warning: These citations may not always be 100% accurate.