edited by Thomas Biolsi
Blackwell Publishing, 2004
Buku Teks
Antonius C.G. Robben
Wiley Blackwell, 2018
Buku Teks
edited by Berys Gaut, Dominic McIver Lopes
Routledge, 2006
Buku Referensi
Mentor book, 1956
Buku Referensi
Boles, John B., author
Blackwell Publishers, 2002
Buku Teks