Ansell, Amy E. Color Blindness. Schaefer, Richard T. (编). Encyclopedia of Race, Ethnicity, and Society. SAGE Publications. 2008: 320–322 [2020-12-26]. ISBN 978-1-45-226586-5. (原始内容存档于2020-10-04).
Ansell, Amy E. Color Blindness. Schaefer, Richard T. (编). Encyclopedia of Race, Ethnicity, and Society. SAGE Publications. 2008: 320–322 [2020-12-26]. ISBN 978-1-45-226586-5. (原始内容存档于2020-10-04).