APA
Harper S., Yesilada Y., . (2008). Web accessibility : a foundation for research. New York: Springer.
Chicago
Harper Simon, Yesilada Yeliz, . 2008. Web accessibility : a foundation for research. New York: Springer.
Harvard
Harper S., Yesilada Y., . (2008). Web accessibility : a foundation for research. New York: Springer.
MLA
Harper Simon, Yesilada Yeliz, . Web accessibility : a foundation for research. New York: Springer. 2008.