HARAHAP, N. .; SIREGAR, A. Z. .; KANSRINI, Y. . Analysis of The State of Educative Workers in Polytechnic of Agricultural (STPP) Lecturers Based on Empirical Data in Sumatera Utara. Jurnal Online PERTANIAN TROPIK, v. 6, n. 2, p. 227- 237, 1 Aug. 2019.