TY - BOOK TI - Teaching and learning at a distance : foundations of distance education / 7th ed AU - Simonson, Michael R., editor. AU - Smaldino, Sharon E., editor AU - Zvacek, Susan, editor. SN - 9781641136266 (Paperback) PB - Information Age Publishing, Inc. PP - Charlotte, North Carolina : Information Age Publishing, Inc., c2019. PY - 2019 UR - https://library.korea.ac.kr/detail/?cid=CAT000046071369&ctype=m