Gaya APA
Aswara, S.
(1996).
Khalifah Abu Bakar Shidiq
.
Bandung:
Rosdakarya Offset.
Gaya MLA
Aswara, Subagdjo.
"Khalifah Abu Bakar Shidiq".
Bandung:
Rosdakarya Offset,
1996.
Printed Book.