Gaya APA
Sugiyono, .
(2019).
Metode Penelitian Dan Pengembangan [ Research And Development ]
(
Cet.4)
.
Bandung:
IKAPI.
Gaya MLA
Sugiyono, .
"Metode Penelitian Dan Pengembangan [ Research And Development ]".
Cet.4
Bandung:
IKAPI,
2019.
SURAT KABAR.