APA

Olsen D. R., Association for Computing Machinery & ACM Special Interest Group on Computer-Human Interaction. (2009). CHI '09 Extended Abstracts on Human Factors in Computing Systems. New York, NY: ACM.

Chicago

Olsen Dan R, Association for Computing Machinery and ACM Special Interest Group on Computer-Human Interaction. 2009. CHI '09 Extended Abstracts on Human Factors in Computing Systems. New York, NY: ACM.

Harvard

Olsen D. R., Association for Computing Machinery and ACM Special Interest Group on Computer-Human Interaction. (2009). CHI '09 Extended Abstracts on Human Factors in Computing Systems. New York, NY: ACM.

MLA

Olsen Dan R, Association for Computing Machinery and ACM Special Interest Group on Computer-Human Interaction. CHI '09 Extended Abstracts on Human Factors in Computing Systems. New York, NY: ACM. 2009.