Legal certainty of surety bond in Indonesia
 Artikel Jurnal
The effect of ratings announcement on bond performance
 Artikel Jurnal
Choudhry, Moorad, author
Corporate bond markets: Instruments and applications
John Wiley & Sons, 2006
 Buku Teks
Umar Junus, author
Perkembangan novel-novel Indonesia
Universiti Malaya, 1974
 Buku Teks
The Cambridge Handbook of historical syntax
edited by Adam Ledgeway and Ian Roberts
Cambridge University Press, 2017
 Buku Teks