WINKER, H. &. O. (2008). HANK ZIPZER THE WORLD'S GREATEST UNDERACHIEVER: I GOT A ''D'' IN SALAMI. WALKER BOOKS.
Chicago-viite (17. p.)WINKER, HENRY & OUVER. HANK ZIPZER THE WORLD'S GREATEST UNDERACHIEVER: I GOT A ''D'' IN SALAMI. LONDON: WALKER BOOKS, 2008.
MLA-viite (9. p.)WINKER, HENRY & OUVER. HANK ZIPZER THE WORLD'S GREATEST UNDERACHIEVER: I GOT A ''D'' IN SALAMI. WALKER BOOKS, 2008.
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