Pardo Wandra, - (2021) PENGARUH MODEL PROBLEM BASED LEARNING (PBL) TERHADAP SPATIAL THINKING PESERTA DIDIK (Studi Kuasi-Eksperimen, Di Kelas XI IPS SMAN 1 Lunang, Kab. Pesisir Selatan). S2 thesis, Universitas Pendidikan Indonesia.
