Ko, C. J., & Barr, R. J. (2011). Dermatopathology: Diagnosis by first impression (2nd ed.). Wiley-Blackwell.

Ko, Christine J., and Ronald J. Barr. Dermatopathology: Diagnosis by First Impression. 2nd ed. Oxford ; New York ; Hoboken, NJ: Wiley-Blackwell, 2011.

Ko, Christine J., and Ronald J. Barr. Dermatopathology: Diagnosis by First Impression. 2nd ed. Wiley-Blackwell, 2011.