Shamsudin, N. H., & Zulkurnain Bin Hassan. (2021). KEBERKESANAN TRAINER UNIT SPPD SEBAGAI ALAT BANTU MENGAJAR BAGI KURSUS PEMASANGAN DAN PENYELENGGARAAN PAIP DOMESTIK: The Effectiveness of Sppd Unit Trainers as Teaching Aids for Domestic Pipe Installation and Maintenance Courses. International Journal of Humanities Technology and Civilization, 6((S2), 29–36. https://doi.org/10.15282/ijhtc.v6i(S2).6247