Mawardi, M., and D. Maranatha. “Seorang Penderita Dengan Retrosternal Goiter: [A Patient With Retrosternal Goiter: A Rare Case]”. Jurnal Respirasi, vol. 2, no. 1, Jan. 2016, pp. 14-23, doi:10.20473/jr.v2-I.1.2016.14-23.