Maeroff, Gene I., author
Palgrave Macmillan, 2006
Buku Teks
Dayati, author
2011
UI - Skripsi (Membership)
Melani Rakhmi Mantu, author
2019
UI - Tesis (Membership)
Rose, Janet, author
Open University Press, 2012
Buku Teks
edited by Janet Moyles
McGraw-Hill, 2007
Buku Teks