Style de citation APA (7e éd.)
(1990). Science Year 1991: The World Book Annual. Science Supplement. A review of Science and Technology During the 1990 School Year. The World Book,Inc.
Style de citation Chicago (17e éd.)
Science Year 1991: The World Book Annual. Science Supplement. A Review of Science and Technology During the 1990 School Year. Chicago: The World Book,Inc, 1990.
Style de citation MLA (9e éd.)
Science Year 1991: The World Book Annual. Science Supplement. A Review of Science and Technology During the 1990 School Year. The World Book,Inc, 1990.
Attention : ces citations peuvent ne pas être correctes à 100%.