Menurut Mochtar Kusumaatmaja hukum internasioanal adalah sekumpulan kaidah dan asas yang mengatur hubungan atau persoalan melintasi batas wilayah suatu negara.
According to Mochtar Kusumaatmaja law internasioanal is a set of rules and the principle that governs the relationship or the question of crossing the borders of a country.
According to Mochtar Kusumaatmadja internasioanal law is a set of rules and principles that govern the relationship or the issue of crossing the borders of a state.