TY - BOOK TI - Learning and instruction : theory into practice 6th ed AU - Gredler, Margaret E. SN - 9780131591233 PB - Merrill Pearson PP - Upper Saddle River, N.J. : Merrill Pearson , c2009. PY - 2009 UR - https://library.korea.ac.kr/detail/?cid=CAT000045532644&ctype=m