Gill, K., & Smith, D. L. (1986). International research centers directory 1986-1987: A World Guide to government, university, independent nonprofit, and commerical research and development centers, institutes, laboratories, bureaus, test facilities, experinent stations, and data collection and analysis centeers, as well as foundations, councils, and other organizations which support research (3rd ed.). Gale Research Co..
শিকাগো স্টাইল (17 তম সংস্করণ) উদ্ধৃতিGill, Kay, এবং Darren L. Smith. International Research Centers Directory 1986-1987: A World Guide to Government, University, Independent Nonprofit, and Commerical Research and Development Centers, Institutes, Laboratories, Bureaus, Test Facilities, Experinent Stations, and Data Collection and Analysis Centeers, as Well as Foundations, Councils, and Other Organizations Which Support Research. 3rd ed. Detroit, Mich.: Gale Research Co., 1986.
M.L.A (9 ম সংস্করণ) উদ্ধৃতিGill, Kay, এবং Darren L. Smith. International Research Centers Directory 1986-1987: A World Guide to Government, University, Independent Nonprofit, and Commerical Research and Development Centers, Institutes, Laboratories, Bureaus, Test Facilities, Experinent Stations, and Data Collection and Analysis Centeers, as Well as Foundations, Councils, and Other Organizations Which Support Research. 3rd ed. Gale Research Co., 1986.