Woodhead, 2013
eBooks
Munjiah Nur Saadah, author
Institut Teknologi Sepuluh Nopember, Faculty of Information and Technology, Department of Informatics, 2014
Artikel Jurnal
Longman Group UK Limited , 1975
Buku Teks
Instructional Software Research, Development (ISRD) Group
Tata McGraw-Hill, 2011
Buku Teks
Fairbank, John K. (John King), editor
Harvard-Yenching Institute , 1952
Buku Klasik