Gaya APA
Sugiyono, .
(2017).
Metode Penelitian & Pengembangan (research and development)
(
Cet. 3)
.
Bandung:
Alfabeta.
Gaya MLA
Sugiyono, .
"Metode Penelitian & Pengembangan (research and development)".
Cet. 3
Bandung:
Alfabeta,
2017.
Text.