APA Style
The World almanac & book of facts 1981. (1989).
:
New York : Newspaper Enterprise Association.
Chicago Style
The World almanac & book of facts 1981.
.
:
New York : Newspaper Enterprise Association,
1989.
.
MLA Style
The World almanac & book of facts 1981.
.
:
New York : Newspaper Enterprise Association,
1989.
.
Turabian Style
The World almanac & book of facts 1981.
:
New York : Newspaper Enterprise Association,
1989.
.