Ellis, Paul D. <br/><br/>
The essential guide to effect sizes: 

 - United Kingdom:  Cambridge university press;  2010. 
 - xvii, 173p.:  ill.; 
<br/><br/><label>ISBN: </label>978-0-521-19423-5 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Research- Statistical methods.