(Rice University) Freely licensed textbooks available in to read online or download in multiple formats, including some classroom resources as well.... คลิกสืบค้น
(State University of New York) An open access publishing initiative by SUNY Libraries, these books are written and peer-reviewed by faculty and fall under a Creative Commons license. คลิกสืบค้น
(California State University) A catalog of open textbook materials from various sources. To find open materials, limit the material type to "Open Textbook" คลิกสืบค้น
(University of Minnesota) All of these textbooks are under a Creative Commons license and are free to use and download. Many are peer-reviewed by professors who have used these books in their classes. คลิกสืบค้น