Gaya APA
Yakin, S., Purwanto, .
(2015).
Rahasia Ramadhan
.
Cibubur:
PT Variapop Group.
Gaya MLA
Yakin, Syamsul., Purwanto, .
"Rahasia Ramadhan".
Cibubur:
PT Variapop Group,
2015.
Text.