Lubis, Anqi Querida, author
The Effectiveness of positive reinforcement towards completion of a time-based task = Efektivitas positive reinforcement terhadap penyelesaian tugas berbasis waktu
2020
 UI - Makalah dan Kertas Kerja
Johnston, Jerome
Positive images
Sage, 1982
 Buku Teks
Bono, Edward de, author
Future positive
M. Temple Smith, 1979
 Buku Teks
Muhammad Noer, author
Positive teaching
Pedagogia, 2011
 Buku Teks
Greene, Joshua David, author
Positive neuroscience
Oxford University Press, 2016
 eBooks
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