Is ethical leadership more important for creating an ethical organisation than having a code of conduct?

Please provide 6 academic journal articles peer reviewed references and 6 other quality references from books.

Assessment Criteria for the Essay are;
- Key issues relating to the question
- Original and clear argument
- Logical and convincing discussion
- Ideas and assertions substantiated through use of high quality reference material and key academic perspectives/views used to develop arguments
- Appropriate Harvard Style referencing

-2000 words