Spelling plus /  [print] 
Steven Babbitt. 
 - third edition. 
 - Colorado Springs, Colorado :  Purposeful Design Publications  (c)2019. 
 - multiple volumes : 
<br/><br/><label>ISBN: </label>9781583313060 9781583313077 9781583313091 9781583313084 9781583313107 9781583313114 9781583313121 9781583313138 9781583313145 9781583313152 
<br/><br/><label>Subjects--Topical Terms: </label><br/>English language--Orthography and spelling--Study and teaching