APA (7th ed.) Citation

(2007). Mystery of the hidden letter. Penerbitan Gema Insan.

Chicago Style (17th ed.) Citation

Mystery of the Hidden Letter. Kuala Lumpur: Penerbitan Gema Insan, 2007.

MLA (9th ed.) Citation

Mystery of the Hidden Letter. Penerbitan Gema Insan, 2007.

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