“Analysis of Social Return On Investment (SROI) To Measure The Social, Environment, And Economics Impact On The National Fattening Sheep Program (Studi At Pesantren Al-Ittifaq)”. 2019. Jurnal Ilmu Sosial Politik Dan Humaniora 2 (2): 33-42. https://doi.org/10.36624/jisora.v2i2.24.