Budhy Kusworo
Universitas Indonesia, 1989
UI - Skripsi (Membership)
Jaspers, Karl
Routledge & Kegan Paul LTD., 1949
Buku Teks
Jaspers, Karl,
Routledge and Kegan Paul, 1953
Buku Teks
[Arab, Universitas Indonesia], 2005
Artikel Jurnal
Astrid S. Susanto
Binacipta, 1986
Buku Teks