Gaya APA

Hakam, A, B, A., Syaerozi, H. (2003). Biografi Umar bin Abdul Aziz Penegak Keadilan / Abdullah bin Abdul Hakam; Penerjemah, Habiburrahman Syaerozi (Cet. 3). Jakarta: Gema Insani Press.

Gaya MLA

Hakam, Abdullah, Bin, Abdul., Syaerozi, Habiburrahman. "Biografi Umar bin Abdul Aziz Penegak Keadilan / Abdullah bin Abdul Hakam; Penerjemah, Habiburrahman Syaerozi". Cet. 3 Jakarta: Gema Insani Press, 2003. Text.