Pardede, J., Utami, D.B. and rochman, adlan chosyiyar 2017. IMPLEMENTASI “PRINCIPAL COMPONENT ANALYSIS - SCALE INVARIANT FEATURE TRANSFORM” PADA CONTENT BASED IMAGE RETRIEVAL. Jurnal Teknik Informatika dan Sistem Informasi. 3, 3 (Dec. 2017). DOI:https://doi.org/10.28932/jutisi.v3i3.696.