APA
petz m., . (2004). The Bad Mood !. new york: north south books.
Chicago
petz moritz, . 2004. The Bad Mood !. new york: north south books.
Harvard
petz m., . (2004). The Bad Mood !. new york: north south books.
MLA
petz moritz, . The Bad Mood !. new york: north south books. 2004.
