Walby, Sylvia
Routledge, 1997
Buku Teks
Johson, Norman W
Cambridge University Press, 2018
Buku Teks
Modenov, P.S.
Academic Press, 1965
Buku Teks
edited by Chang Yun-Shik and Steven Hugh Lee
Routledge, 2006
Buku Teks
Porter, David A.
CRC Pres, 2009
Buku Teks