Fisher, W. H. (1974). Final report on study of availability and quality of national statistics on R. & D. in selected CECD countriesto National Science Foundation, Office of National R. & D. Assessment. Battelle Columbus Laboratories.
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)Fisher, W. Halder. Final Report on Study of Availability and Quality of National Statistics on R. & D. in Selected CECD Countriesto National Science Foundation, Office of National R. & D. Assessment. Columbus, Ohio: Battelle Columbus Laboratories, 1974.
توثيق جمعية اللغة المعاصرة MLA (الطبعة الثامنة)Fisher, W. Halder. Final Report on Study of Availability and Quality of National Statistics on R. & D. in Selected CECD Countriesto National Science Foundation, Office of National R. & D. Assessment. Battelle Columbus Laboratories, 1974.