Desinawati, N., and N. Isnaini. “PENAMPILAN REPRODUKSI SAPI PERANAKAN SIMMENTAL DI KABUPATEN TULUNGAGUNG JAWA TIMUR”. TERNAK TROPIKA Journal of Tropical Animal Production, vol. 11, no. 2, Apr. 2012, pp. 41-47, https://ternaktropika.ub.ac.id/index.php/tropika/article/view/101.