Saputra, A.A. dan Shofiah, V. (2024) “Increasing The Study Interest: The Effectivity of Poster Group Discussion-Sticker Reward (PDG-SR) to Increase The Study Interest in English”, PROCEEDING SERIES OF PSYCHOLOGY, 2(1), hlm. 365–369. Tersedia pada: https://psikologi.unair.ac.id/proceeding-series-of-psychology/index.php/psp/article/view/60 (Diakses: 16 September 2025).