M. A. Sultan, A. Gaus, I. H. A. Wahab, A. M. Abdullah, and N. Nu’man, “Dampak Pandemi Covid-19 Terhadap Tingkat Pelayanan Moda Transportasi Speedboat Tidore-Sofifi”, JRKMS, vol. 3, no. 2, pp. 89–96, Sep. 2020.