Ibrahim Abu Bakar. (1992). Ciri-Ciri Usahawan Islam. Bahagian Hal Ehwal Islam.
Chicago Style (17th ed.) CitationIbrahim Abu Bakar. Ciri-Ciri Usahawan Islam. Kuala Lumpur: Bahagian Hal Ehwal Islam, 1992.
MLA (9th ed.) CitationIbrahim Abu Bakar. Ciri-Ciri Usahawan Islam. Bahagian Hal Ehwal Islam, 1992.
Warning: These citations may not always be 100% accurate.