Analisis pengaruh harga minyak arus kas operasional dan long term debt terhadap return saham perusahaan minyak dan gas periode sebelum saat dan setelah krisis keuangan global = Analysis of the effect of oil price operating cash flow and long term debt to stock Return in Oil and Gas Company before prior and after global financial crisis - Guzik Wiji Arumsasi, author (Fakultas Ekonomi dan Bisnis Universitas Indonesia, 2014)