Robert Maxwell & Co. Documentation & Supply Centre, Ball, C. D., & Raa, R. t. (1966). Computers and associated subjects: January, 1962 through February, 1966 (2nd rev. ed.). Documentation and Procurement Center, Maxwell Scientific International].
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)Robert Maxwell & Co. Documentation & Supply Centre, Christine D. Ball, و Ruth ten Raa. Computers and Associated Subjects: January, 1962 Through February, 1966. 2nd rev. ed. [New York: Documentation and Procurement Center, Maxwell Scientific International], 1966.
توثيق جمعية اللغة المعاصرة MLA (الطبعة الثامنة)Robert Maxwell & Co. Documentation & Supply Centre, et al. Computers and Associated Subjects: January, 1962 Through February, 1966. 2nd rev. ed. Documentation and Procurement Center, Maxwell Scientific International], 1966.