Gaya APA
Qasim, Y.
(1981).
Nadhariyah al Dharurah / Yusuf Qasim
.
Kairo:
Dar Al Nahdhah Al rabiyah.
Gaya MLA
Qasim, Yusuf.
"Nadhariyah al Dharurah / Yusuf Qasim".
Kairo:
Dar Al Nahdhah Al rabiyah,
1981.
Buku.