Gaya APA
Upton, C., Widdowson, J, D, A.
(1996).
An atlas of English dialects
.
New York:
Oxford Univerity Press.
Gaya MLA
Upton, Clive., Widdowson, J., D., A..
"An atlas of English dialects".
New York:
Oxford Univerity Press,
1996.
Text.