Columbia subject headings:
English language--Canada--Bibliography.
English language--Dialects--Bibliography.
English language--Foreign countries--Bibliography.
English language--United States--Bibliography.
English language--Variation--Bibliography.
Harvard subject headings:
English language--Canada--Bibliography.
English language--Dialects--Bibliography.
English language--Foreign countries--Bibliography.
English language--United States--Bibliography.
English language--Variation--Bibliography.
Princeton subject headings:
English language--Canada--Bibliography.
English language--Dialects--Bibliography.
English language--Foreign countries--Bibliography.
English language--United States--Bibliography.
English language--Variation--Bibliography.