Gaya APA
Asyur, D, M, A.
(2004).
Khotbah dan wasiat umar ibnul khaththab
.
Jakarta:
Gema Insani.
Gaya MLA
Asyur, Dr., Muhammad, Ahmad.
"Khotbah dan wasiat umar ibnul khaththab".
Jakarta:
Gema Insani,
2004.
.