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HERLAMBANG AS. MARKETING COMMUNICATION IMPLEMENTATION OF INFORMAL EDUCATION INSTITUTION "SEAMAN’S ENGLISH EDUCATION INDONESIA". econosains [Internet]. 2019 Oct. 27 [cited 2024 Nov. 22];17(1):41-52. Available from: https://journal.unj.ac.id/unj/index.php/econosains/article/view/11021