edited by John Daintith
CRC Press, 2009
Buku Referensi
Kornhauser, William
University of California , 1963
Buku Teks
Harsja W. Bachtiar, 1934-, author
Indonesian Institute of Sciences, 1976
Buku Referensi
Indonesian Institute of Sciences, 1973
Buku Referensi
Yost, Edna
Kinta, 1961
Buku Teks