Ramanayaka,Ranjith උසස්යා පෙළ ව්යාපාර කළමනාකරණය = usas peLa vyaapaara aDHyayanaya : vyaapaara kaLamanaakaraNaya - Nugegoda: Sarasavi, 2013. - 206p.; 22 cm ISBN: 978-955-671-598-9 Subjects--Topical Terms: Business ManagementManagement Dewey Class. No.: 658.11 / RAM