Utsman, M. A. 4 Para Ilmuwan Handal: Seri Tokoh Muslim Pengubah Dunia. Pilar Religia.
Chicago Style (17th ed.) CitationUtsman, Muhammad Ali. 4 Para Ilmuwan Handal: Seri Tokoh Muslim Pengubah Dunia. Pilar Religia.
MLA (8th ed.) CitationUtsman, Muhammad Ali. 4 Para Ilmuwan Handal: Seri Tokoh Muslim Pengubah Dunia. Pilar Religia.
Warning: These citations may not always be 100% accurate.