Siregar, Diky Syamhenri, and Noni Rozaini. “Analisis Pengaruh Ekspor, Impor Dan Nilai Tukar Terhadap Neraca Perdagangan Provinsi Sumatera Utara Tahun 2016-2021”. Innovative: Journal Of Social Science Research, vol. 3, no. 2, May 2023, pp. 1798-0, https://j-innovative.org/index.php/Innovative/article/view/504.