APA (7th ed.) Citation

Ho, P. F. (2014). Preventing shoulder-surfing attack using image password concealing scheme.

Chicago Style (17th ed.) Citation

Ho, Peng Foong. Preventing Shoulder-surfing Attack Using Image Password Concealing Scheme. 2014.

MLA (8th ed.) Citation

Ho, Peng Foong. Preventing Shoulder-surfing Attack Using Image Password Concealing Scheme. 2014.

Warning: These citations may not always be 100% accurate.