Candy, P. C. (1991). Self-direction for lifelong learning: A comprehensive guide to theory and practice (First edition.). Jossey-Bass.
Chicago-viite (17. p.)Candy, Philip C. Self-direction for Lifelong Learning: A Comprehensive Guide to Theory and Practice. First edition. San Francisco: Jossey-Bass, 1991.
MLA-viite (8. p.)Candy, Philip C. Self-direction for Lifelong Learning: A Comprehensive Guide to Theory and Practice. First edition. Jossey-Bass, 1991.
Varoitus: Nämä viitteet eivät aina ole täysin luotettavia.