Learn & Work Ecosystem Library. (2023). Zero Textbook Cost (ZTC). Retrieved 13 September 2026, from https://learnworkecosystemlibrary.com/glossary/zero-textbook-cost-ztc/
MLA
"Zero Textbook Cost (ZTC)." Learn & Work Ecosystem Library, 28 November 2023, https://learnworkecosystemlibrary.com/glossary/zero-textbook-cost-ztc/. Accessed 13-09-2026.
Chicago only requires the accessed date in a citation if no publication date is listed for the source. While many of the Library's entries include a 'last updated' timestamp, some do not, and for these you should include your accessed date.
Refers to reducing or eliminating the financial burden on learners by offering educational materials, including textbooks, at no cost. This can involve utilizing open educational resources (OER), library resources, or other freely accessible materials.
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