قطب، سيد. (1981). Sistem hidup. Pustaka Nadwah.
Chicago Style (17th ed.) Citationقطب، سيد. Sistem Hidup. Selangor: Pustaka Nadwah, 1981.
MLA (9th ed.) Citationقطب، سيد. Sistem Hidup. Pustaka Nadwah, 1981.
Warning: These citations may not always be 100% accurate.