Buakeeree, Kruan, และ Piyanan Nualhnuplong. 2016. “Effects of dietary protein and energy levels on growth performances and reproductive system development in female Betong chicken (Gallus domesticus) during growing-pullet period”. วารสารแก่นเกษตร 44 (3):469-78. https://li01.tci-thaijo.org/index.php/agkasetkaj/article/view/250437.