Richter, Max M.
Musical worlds in Yogyakarta / Max M. Richter
Faculty of Humanities University of Indonesia; Leiden: KITLV Press, 2016
 Artikel Jurnal
Russell, Richard Joel
Culture worlds
Macmillan, 1954, 1951
 Buku Teks SO
Russell, Richard Joel
Culture worlds
Macmillan, 1958
 Buku Teks SO
Worlds Apart
editor Daniel Millea
Routledge, 1995
 Buku Teks SO
Robinson, W. Peter
Language in social worlds
Blackwell, 2003
 Buku Teks SO