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.