Gd, S. (2005). Misteri Gelas Kembar. Gramedia Pustaka Utama.
Chicago Style (17th ed.) CitationGd, S.Mara. Misteri Gelas Kembar. Gramedia Pustaka Utama, 2005.
MLA (8th ed.) CitationGd, S.Mara. Misteri Gelas Kembar. Gramedia Pustaka Utama, 2005.
Warning: These citations may not always be 100% accurate.