Haryanto, D. i in. 2020. Analysis of supervision of port authority on the activities of loading and unloading dangerous goods in the port of Tanjung Perak Surabaya. Współczesna Gospodarka. 11, 1 (35) (cze. 2020), 39–43. DOI:https://doi.org/10.26881/wg.2020.1.04.