Pengaruh Tax Treaty pada production Sharing Contract pertambangan minyak bumi di Indonesia serta implikasinya terhadap investasi dalam pertambangan minyak bumi di Indonesia (Studi terhadap Production Sharing Contract Kontraktor X) = The influence of Tax Treaty on Production Sharing Contract mining petroleum in Indonesia as well as the implication against investment in mining petroleum in Indonesia (A study of Production Sharing Contract Contractor X)