Goddard, Cliff
Oxford University Press, 2014
Buku Teks
Gruber, Jeffrey S.
North-Holland , 1976
Buku Teks
Cambridge University Press, 2004
eBooks
Lewis, C.S.
Cambridge University Press, 1994
Buku Teks
Siti Jamaliah
Fakultas Ilmu Pengetahuan dan Budaya Universitas Indonesia, 2013
UI - Skripsi (Membership)