Discuss the following statament: effective managers need to have an understanding of personal and business ethics

i wouldlike this assay to be an ACADEMIC ASSAY, so you have to use some currents sources, please use aswell my source listed above and others.
the more important a good introduction and conclusion as this is an academic assay ,use the quotes, critical comment about the books rod, and reference within the text.
Mullins, L,J(2007) management and organisational behaviour, 8th edition, harlow: person education.

Butcher,D., Clarke, J.H.(1999),organisation politics: the missing discipline of management, Industrial and Commercial Training,31(1)pp.9-12.

HUCZYNSKI,A.and Buchanan,D.(2004)organisational behaviour(5th ed),harlow: pearson.

Rosemary thomson(2002) 3 edition, managing people