Olson, G. M., Olson, J. S., & Robertson, S. P. (1991). Human factors in computer systems. Reaching through technology: CHI'91.Conference Proceedings ACM/SIGCHI. New Orleans, Louisiana, April 27 - May 2, 1991. Association for Computing Machinery.
Παραπομπή σε μορφή Chicago (17η εκδ.)Olson, Gary M., Judith S. Olson, και Scott P. Robertson. Human Factors in Computer Systems. Reaching Through Technology: CHI'91.Conference Proceedings ACM/SIGCHI. New Orleans, Louisiana, April 27 - May 2, 1991. New York: Association for Computing Machinery, 1991.
Παραπομπή σε μορφή MLA (8th εκδ.)Olson, Gary M., et al. Human Factors in Computer Systems. Reaching Through Technology: CHI'91.Conference Proceedings ACM/SIGCHI. New Orleans, Louisiana, April 27 - May 2, 1991. Association for Computing Machinery, 1991.
