Pengaruh degree of economic leverage (DEL), degree of operating leverage (DOL), dan degree of financial leverage (DFL) terhadap risiko sistematik saham perusahaan manufaktur di Bursa Efek Indonesia - , ASTERIA, Beta, Prof. Dr. Eduardus Tandelilin, M.B.A ([Yogyakarta] : Universitas Gadjah Mada, 2009)