Gaya APA
Sugiyono, .
(2019).
Metode Penelitian & Pengembangan (Research and Development/ R&D)
.
Bandung:
ALFABETA CV.
Gaya MLA
Sugiyono, .
"Metode Penelitian & Pengembangan (Research and Development/ R&D)".
Bandung:
ALFABETA CV,
2019.
Text.