“CREATING SHARED VALUE PT PETROKIMIA GRESIK MELALUI PETERNAKAN SAPI TERINTEGRASI”, STAP, vol. 9, hlm. 220–225, Jun 2022, Diakses: 19 Desember 2025. [Daring]. Tersedia pada: http://jnp.fapet.unsoed.ac.id/index.php/psv/article/view/841