DIXON, F. W. (1987). THE HARDY BOYS BOYS MYSTERY STORIES: THE TOWER TREASURE. GROSSET & DUNLAP.
Chicago-čujuhus (17. p.)DIXON, FRANKLIN. W. THE HARDY BOYS BOYS MYSTERY STORIES: THE TOWER TREASURE. NEW YORK: GROSSET & DUNLAP, 1987.
MLA-čujuhus (9. p.)DIXON, FRANKLIN. W. THE HARDY BOYS BOYS MYSTERY STORIES: THE TOWER TREASURE. GROSSET & DUNLAP, 1987.
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