Irvington Publ., 1967
Buku Teks
Harsja W. Bachtiar, 1934-
Indonesian Institute of Sciences, 1976
Buku Referensi
Strauss, Anselm L.
Cambrigde University Press, 1987
Buku Teks
Hanushek, Eric A.
Academic Press, 1977
Buku Teks
Macy, Beverly
McGraw-Hill, 2011
Buku Teks