na INLIS000000000011260 20190816093551 0010-0819000056 ta 190816 g 1 ind 978-602-99743-1-7 371.1 371.1 LUB j Lubis, Gelora Mulia Jurus jitu guru beken : 11 tips mempertajam profesionalitas guru / Gelora Mulia Lubis Cet.3. Medan : Menara Langit Publishing, 2013 169 hlm. : ilus. ; 21 cm Bibliografi : hlm. 165-166 Guru 22.954/DPDA/DS/2019