Sari, M. L., R. Noor, P. S. Hardjosworo, and C. Nisa. “Study on the Biological Characteristics of Pegagan Duck”. Jurnal Lahan Suboptimal : Journal of Suboptimal Lands, vol. 1, no. 2, Feb. 2013, doi:10.33230/JLSO.1.2.2012.23.