APA Style
Encyclopaedia Britannica : 1989 Britannica book of the year :events of 1988 /By encyclopaedia Britannica. (1989).
Chigago:
Encyclopaedia Britannica,1989.
Chicago Style
Encyclopaedia Britannica : 1989 Britannica book of the year :events of 1988 /By encyclopaedia Britannica.
.
Chigago:
Encyclopaedia Britannica,1989,
1989.
Text.
MLA Style
Encyclopaedia Britannica : 1989 Britannica book of the year :events of 1988 /By encyclopaedia Britannica.
.
Chigago:
Encyclopaedia Britannica,1989,
1989.
Text.
Turabian Style
Encyclopaedia Britannica : 1989 Britannica book of the year :events of 1988 /By encyclopaedia Britannica.
Chigago:
Encyclopaedia Britannica,1989,
1989.
Print.