Horry, R., & Sporer, S. L. (2011). Recognizing faces from ethnic in-groups and out-groups: Importance of outer face features and effects of retention interval. Applied Cognitive Psychology, 25(3), pp. 424-431. doi:10.1002/acp.1709

Horry, Ruth, and Siegfried L. Sporer. "Recognizing Faces From Ethnic In-groups and Out-groups: Importance of Outer Face Features and Effects of Retention Interval." Applied Cognitive Psychology 25, no. 3 (2011): 424-431.

Horry, Ruth, and Siegfried L. Sporer. "Recognizing Faces From Ethnic In-groups and Out-groups: Importance of Outer Face Features and Effects of Retention Interval." Applied Cognitive Psychology 25.3 (2011): 424-431.