S Mara, G. (2001). Misteri Gelas Kembar/ S. Mara, Gd. Jakarta: Gramedia Pustaka Utama.
Chicago Style (17th ed.) CitationS Mara, Gd. Misteri Gelas Kembar/ S. Mara, Gd. Jakarta: Gramedia Pustaka Utama, 2001.
MLA (8th ed.) CitationS Mara, Gd. Misteri Gelas Kembar/ S. Mara, Gd. Jakarta: Gramedia Pustaka Utama, 2001.
Warning: These citations may not always be 100% accurate.