Gagne, Robert M. <br/><br/>
Principle of Instruction Design 

 - 2nd ed. 
 - Newyork:  Holt, Rinehart and winston;  1979. 
 - 321p. 
<br/><br/>Include Reference Index 
<br/><br/><label>ISBN: </label>0030408067 
<br/><br/><label>Dewey Class. No.: </label>371.3