APA (7th ed.) Citation

Magalhães, P. S. T., Revett, K., & Santos, H. D. d. (2006). Critical aspects In authentication graphic keys.

Chicago Style (17th ed.) Citation

Magalhães, Paulo Sérgio Tenreiro, Kenneth Revett, and Henrique Dinis dos Santos. Critical Aspects In Authentication Graphic Keys. 2006.

MLA (8th ed.) Citation

Magalhães, Paulo Sérgio Tenreiro, et al. Critical Aspects In Authentication Graphic Keys. 2006.