Gaya APA
Khalid, K, M.
(2009).
Di hadapan umar : novel memoar Khulafaur Rasyidin
.
Yogyakarta:
Mitra Pustaka.
Gaya MLA
Khalid, Khalid, Muhammad.
"Di hadapan umar : novel memoar Khulafaur Rasyidin".
Yogyakarta:
Mitra Pustaka,
2009.
Text.