STINE, R. Misteri cincin hitam. Gramedia Pustak.
Chicago Style (17th ed.) CitationSTINE, R.L. Misteri Cincin Hitam. Gramedia Pustak.
MLA (8th ed.) CitationSTINE, R.L. Misteri Cincin Hitam. Gramedia Pustak.
Warning: These citations may not always be 100% accurate.