Lopulalan PM, Surnata, Rahmah A. Operational efficiency of loading and unloading activities using the time and motion study method at Tanjung Priok Port. ejmi [Internet]. 2026 Jun. 1 [cited 2026 Oct. 31];8(1):105-14. Available from: https://ejournal.poltekpel-banten.ac.id/index.php/ejmi/article/view/231