Gaya APA
Risnanto, R. (2021).
Model Pembelajaran Problem Based Learning Di Sekolah Dasar (cet.1).
YOGYAKARTA:
Pustaka Egaliter.
Gaya MLA
Risnanto, Rido.
"Model Pembelajaran Problem Based Learning Di Sekolah Dasar".
cet.1
YOGYAKARTA:
Pustaka Egaliter,
2021.
Text.