Gaya APA

Afifah, A, A. (2015). Kisah Khulafa'ur Rasyidin: Umar Bin Khatab . solo: zamzam.

Gaya MLA

Afifah, Ar-Raji, Abu. "Kisah Khulafa'ur Rasyidin: Umar Bin Khatab". solo: zamzam, 2015. Text.