I have enjoyed studying in the Pathway program. This semester religion class introduced me to a wonderful and invaluable resource I never knew existed called the Scripture Citation Index. In this resource you can do a search for any scripture and find where it was cited in any GC talk from 1942 on as well as those cited by speakers recorded in the Journal of Discourses between 1839 and 1886. The citations in Teachings of the Prophet Joseph Smith come from the special edition, Scriptural Teachings of the Prophet Joseph Smith, edited by Richard C. Galbraith and published by Deseret Book in 1993 (ISBN 0875796478).
At the bottom of the page it gives you the option to search and read any of the resources by topic or do a search by speaker or author. Have fun playing with this site.
What a delightful resource! You can access it here and be sure you bookmark it for future use. It appears to be managed by BYU. http://scriptures.byu.edu/#::p