Harsja W. Bachtiar, 1934-
Indonesian Institute of Sciences, 1976
Buku Referensi
Strauss, Anselm L.
Cambrigde University Press, 1987
Buku Teks SO
Hanushek, Eric A.
Academic Press, 1977
Buku Teks SO
Hanushek, Eric A.
Academic Press, 1977
Buku Teks SO
Stopher, Peter R.
Lexington Books, 1979
Buku Teks