Communication skills
1. Business Communication for Success v 1.0 by McLean (Custom License)
2. Business Communication for Success v 2.0 by McLean (Custom License)
3. Communication skills by Sitima (CC-BY-NC-SA)
4. Communication skills for personal and professional development by Rivers (CC-BY-NC-SA)
5. Communication Theory by Wikibooks (CC-BY-SA)
6. Communication by Boundless (CC-BY-SA)
7. Exploring public speaking by Tucker and Burton (CC-BY-NC-SA)
8. How Language works: the cognitive science of linguistics by Gasser (GFDL)
9. How to present with Twitter by Mitchell (CC-BY-NC-ND)
10. Stand up, speak out by University of Minnesota Libraries Publishing (CC-By-NC-SA)