Transaksi sewa guna usaha dengan objek kapal analisis perjanjian sewa guna usaha pada PT X finance dan pengaruh ketentuan ratifikasi konvensi penahanan kapal dalam instruksi Presiden nomor 5 tahun 2005 terhadap perjanjian sewa guna usaha = Ship leasing transaction analysing ship leasing contract in company X finance and the impact of the ratification of the convention on the arrest of ships determined in Presidential instruction no 5 year 2005 concerning the lease contract / Firza Achmad Singgih Afero