APA (7th ed.) Citation

CHEN, S., & ZHU, Y. Shoulder-surfing resistant PIN-entry method. POSTS&TELECOM PRESS Co., LTD.

Chicago Style (17th ed.) Citation

CHEN, Shudi, and Youwen ZHU. Shoulder-surfing Resistant PIN-entry Method. POSTS&TELECOM PRESS Co., LTD.

MLA (9th ed.) Citation

CHEN, Shudi, and Youwen ZHU. Shoulder-surfing Resistant PIN-entry Method. POSTS&TELECOM PRESS Co., LTD.

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