APA (7th ed.) Citation

RIDWAN, M. (2006). Memperkuat daya Ingat. Fajar Pubishing House.

Chicago Style (17th ed.) Citation

RIDWAN, Muhammad. Memperkuat Daya Ingat. Fajar Pubishing House, 2006.

MLA (8th ed.) Citation

RIDWAN, Muhammad. Memperkuat Daya Ingat. Fajar Pubishing House, 2006.

Warning: These citations may not always be 100% accurate.