Gaya APA
Al-Qahthani, M, S.
(1991).
Memurnikan Laa Ilaaha Illallah
.
Yogyakarta:
Gema Insani.
Gaya MLA
Al-Qahthani, Muhammad, Said.
"Memurnikan Laa Ilaaha Illallah".
Yogyakarta:
Gema Insani,
1991.
Buku Tex.