de Villiers, P. J. A., & Shumaker, D. E. (1980). International Exchange of Bibliographic Information on Materials for the Blind and Physically Handicapped.
Chicago Style (17th ed.) Citationde Villiers, Pieter J. A., and David E. Shumaker. International Exchange of Bibliographic Information on Materials for the Blind and Physically Handicapped. 1980.
MLA (9th ed.) Citationde Villiers, Pieter J. A., and David E. Shumaker. International Exchange of Bibliographic Information on Materials for the Blind and Physically Handicapped. 1980.
Warning: These citations may not always be 100% accurate.