APA
The Economist Publications, . (1999). The world in 1999. Australia: The Economist Publications.
Chicago
The Economist Publications, . 1999. The world in 1999. Australia: The Economist Publications.
Harvard
The Economist Publications, . (1999). The world in 1999. Australia: The Economist Publications.
MLA
The Economist Publications, . The world in 1999. Australia: The Economist Publications. 1999.
