National Research Council (U.S.). Office of Scientific and Engineering Personnel, National Science Foundation (U.S.), United States. Dept. of Education, National Institutes of Health (U.S.), National Endowment for the Humanities, United States. Dept. of Agriculture, . . . Clarke, J. E. (1995). Summary report 1993 doctorate recipients from United States universities. National Academy Press.
Παραπομπή σε μορφή Chicago (17η εκδ.)National Research Council (U.S.). Office of Scientific and Engineering Personnel, National Science Foundation (U.S.), United States. Dept. of Education, National Institutes of Health (U.S.), National Endowment for the Humanities, United States. Dept. of Agriculture, Inc ebrary, Delores H. Thurgood, και Julie E. Clarke. Summary Report 1993 Doctorate Recipients from United States Universities. Washington, D.C.: National Academy Press, 1995.
Παραπομπή σε μορφή MLA (9th εκδ.)National Research Council (U.S.). Office of Scientific and Engineering Personnel, et al. Summary Report 1993 Doctorate Recipients from United States Universities. National Academy Press, 1995.