Cita APA (7th ed.)
Covington, G. A., & Hannah, B. (1997). Access by design. Van Nostrand Reinhold.
Cita Chicago (17th ed.)
Covington, George A., i Bruce Hannah. Access by Design. New York: Van Nostrand Reinhold, 1997.
Cita MLA (9th ed.)
Covington, George A., i Bruce Hannah. Access by Design. Van Nostrand Reinhold, 1997.
Atenció: Aquestes cites poden no estar 100% correctes.