Krashen, Stephen D. dan Tracy D. Terrell. <br/><br/>
The Natural Approach:  Language Acquisition in the Classroom. 

 - Oxford:  Pergamon Press,  1984. 
 - vi, 191p.  21 cm. 
<br/><br/><label>ISBN: </label>0 88084 005 7 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Pendidikan Bahasa
<br/><br/><label>LC Class. No.: </label>LB1575.8  / .K73 1983 
<br/><br/><label>Dewey Class. No.: </label>400.7