APA

Ryan R. M., Deci E. L. & ProQuest (Firm). (2017). Self-determination theory. New York: Guilford Press.

Chicago

Ryan Richard M, Deci Edward L and ProQuest (Firm). 2017. Self-determination theory. New York: Guilford Press.

Harvard

Ryan R. M., Deci E. L. and ProQuest (Firm). (2017). Self-determination theory. New York: Guilford Press.

MLA

Ryan Richard M, Deci Edward L and ProQuest (Firm). Self-determination theory. New York: Guilford Press. 2017.