Gill, K., & Kruzas, A. T. (1982). International research centers directory: A world guide to government, university, independent nonprofit and commercial research and development centers, institutes, laboratories, bureaus, test facilities, experiment stations and data collections and analysis centers, as well as foundations, councils and other organizations which support research. Gale.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रGill, Kay, और Anthony Thomas Kruzas. International Research Centers Directory: A World Guide to Government, University, Independent Nonprofit and Commercial Research and Development Centers, Institutes, Laboratories, Bureaus, Test Facilities, Experiment Stations and Data Collections and Analysis Centers, as Well as Foundations, Councils and Other Organizations Which Support Research. Detroit: Gale, 1982.
एमएलए (9वां संस्करण) प्रशस्ति पत्रGill, Kay, और Anthony Thomas Kruzas. International Research Centers Directory: A World Guide to Government, University, Independent Nonprofit and Commercial Research and Development Centers, Institutes, Laboratories, Bureaus, Test Facilities, Experiment Stations and Data Collections and Analysis Centers, as Well as Foundations, Councils and Other Organizations Which Support Research. Gale, 1982.