Tchudi, S. (1993). Lock & key: The secrets of locking things up, in, and out. Charles Scribner's Sons ; Maxwell Macmillan Canada ; Maxwell Macmillan International.
Chicago-referens (17:e uppl.)Tchudi, Stephen. Lock & Key: The Secrets of Locking Things Up, in, and Out. New York : Toronto : New York: Charles Scribner's Sons ; Maxwell Macmillan Canada ; Maxwell Macmillan International, 1993.
MLA-referens (8:e uppl.)Tchudi, Stephen. Lock & Key: The Secrets of Locking Things Up, in, and Out. Charles Scribner's Sons ; Maxwell Macmillan Canada ; Maxwell Macmillan International, 1993.
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