Hagwood, S. (2009). Rahasia Melejitkan Daya Ingat Otak Hanya Dalam 7 Hari. Think Jogjakarta.
Chicago Style (17th ed.) CitationHagwood, Scott. Rahasia Melejitkan Daya Ingat Otak Hanya Dalam 7 Hari. Think Jogjakarta, 2009.
MLA (8th ed.) CitationHagwood, Scott. Rahasia Melejitkan Daya Ingat Otak Hanya Dalam 7 Hari. Think Jogjakarta, 2009.
Warning: These citations may not always be 100% accurate.