Guay, Frederic. <br/><br/>
Trajectories of self-determined motivation during the secondary school :  a growth mixture analysis / 
Frederic Guay, Alexandre J.S Morin, David Litalien, Joshua L. Howard, and William Gilbert. 
 - Washington, DC ;  American Psychological Association ,  February 2021. 
 - Volume 113, pages 390-410 :  illustration ;  28 cm. 
<br/><br/> Journal of Educational Psychology, vol. 113, no. 2, pages 390-410, February 2021. 
<br/><br/><label>Dewey Class. No.: </label>DPer 370.15 J826 January-February 2021 v. 113 n. 1-2