Tinjauan yuridis erhadap pelaksanaan eksekusi gadai saham melalui penjualan secara tertutup (studi kasus eksekusi gadai saham PT ongko multicorpora) = Yuridical review on the execution of pledge of shares through private selling : Case study on the execution of pledge of shares of PT Ongko Multicorpora - Ivan Lazuardi Suwana, author (Universitas Indonesia, 2009)