KEITH, M., SHAO, B., & STEINBART, P. J. (2007, January 1). The usability of passphrases for authentication : An empirical field study. 65(1). London: Elsevier, 2007. Retrieved from http://pascal-francis.inist.fr/vibad ndex.php?action=search&terms=18357098
ISO-690 (author-date, English)KEITH, Mark, SHAO, Benjamin and STEINBART, Paul John, 2007. The usability of passphrases for authentication : An empirical field study. In: [online]. London: Elsevier, 2007. 1 January 2007. Available from: http://pascal-francis.inist.fr/vibad ndex.php?action=search&terms=18357098
Modern Language Association 9th editionKEITH, M., B. SHAO, and P. J. STEINBART. The usability of passphrases for authentication : An empirical field study. no. 1, London: Elsevier, 2007., 2007, http://pascal-francis.inist.fr/vibad ndex.php?action=search&terms=18357098.
Mohr Siebeck - Recht (Deutsch - Österreich)Emerald - Harvard
KEITH, M., SHAO, B. and STEINBART, P.J. (2007), “The usability of passphrases for authentication : An empirical field study”, in , Vol. 65, London: Elsevier, 2007., available at: http://pascal-francis.inist.fr/vibad ndex.php?action=search&terms=18357098.