Gaya APA
Umam,Khairul, . (2003).
Tokoh-tokoh islam Kharismatik : Pasca Rasulullah Saw / Khairul Umam .
Jakarta:
Nur Insani.
Gaya MLA
Umam,Khairul, .
"Tokoh-tokoh islam Kharismatik : Pasca Rasulullah Saw / Khairul Umam".
Jakarta:
Nur Insani,
2003.
Text.