Panjaitan, Thyophoida W.S., and Maria Widyastuti. “Analisis Investasi Instrumen Obligasi”. BIP’s JURNAL BISNIS PERSPEKTIF 4, no. 1 (January 31, 2012): Hal 47 – 65. Accessed August 6, 2025. https://jurnal.ukdc.ac.id/index.php/BIP/article/view/144.