Theng Kock Leing. (2005). Ekonomi asas: Tingkatan 4. Sasbadi.
Chicago Style (17th ed.) CitationTheng Kock Leing. Ekonomi Asas: Tingkatan 4. Petaling Jaya: Sasbadi, 2005.
MLA (9th ed.) CitationTheng Kock Leing. Ekonomi Asas: Tingkatan 4. Sasbadi, 2005.
Warning: These citations may not always be 100% accurate.