C.R., Lumbansiantar, 		Inggriati, N. W. T., AND 		Suarta, I G..
" THE LEVEL OF MOTIVATION OF FARMERS IN  INTENSIVE PIG BREEDING   (Case Study in Sipinggan Lumbansiantar Village Nainggolan  District Samosir Regency North Sumatra Province)" <em>Jurnal Peternakan Tropika</em> [Online], Volume 12 Number 4 (2 July 2024)