The 1990 World Book Year Book. Chicago etc.: World Book, 1990 576 p. : ill. 0-7166-0490-6.
The 1990 World Book Year Book. Chicago etc.: World Book, 1990 576 p. : ill. 0-7166-0490-6.
(1990) The 1990 World Book Year Book, Chicago etc.: World Book 576 p. : ill. 0-7166-0490-6.
(1990). The 1990 World Book Year Book. The Annual Supplement to The World Book Encyclopedia : A Review of the Events of 1989. Chicago etc.: World Book, 576 p. : ill.
The 1990 World Book Year Book: The Annual Supplement to The World Book Encyclopedia : A Review of the Events of 1989. Chicago etc.: World Book; 1990. p. 576 p. : ill. ISBN: 0-7166-0490-6.