Turkington & Nor Halina Ghazali. (1999). 12 langkah ke arah daya ingatan cemerlang. Prentice Hall.
Chicago Style (17th ed.) CitationTurkington and Nor Halina Ghazali. 12 Langkah Ke Arah Daya Ingatan Cemerlang. Petaling Jaya: Prentice Hall, 1999.
MLA (8th ed.) CitationTurkington and Nor Halina Ghazali. 12 Langkah Ke Arah Daya Ingatan Cemerlang. Prentice Hall, 1999.
Warning: These citations may not always be 100% accurate.