Gaya APA
WOLFRAM, W., SCHILLING, N. (2016).
American English dialects and variation (3rd. ed.).
West Sussex:
John Wiley & Sons.
Gaya MLA
WOLFRAM, Walt., SCHILLING, Natalie.
"American English dialects and variation ".
3rd. ed.
West Sussex:
John Wiley & Sons,
2016.
Buku.