ENID, B. (2015). THE SECRET SEVEN: SECRET SEVEN ON THE TRAIL (1st.). HODDER CHILDREN'S BOOKS.
芝加哥风格引文ENID, BLYTON. THE SECRET SEVEN: SECRET SEVEN ON THE TRAIL. 1st. GREAT BRITAIN: HODDER CHILDREN'S BOOKS, 2015.
MLA引文ENID, BLYTON. THE SECRET SEVEN: SECRET SEVEN ON THE TRAIL. 1st. HODDER CHILDREN'S BOOKS, 2015.
警告：这些引文格式不一定是100％准确.