Citazione Stile APA (7a Edizione)
(1991). Science year 1991: A review of science and technology during the 1990 school year. World Book, Inc.
Citazione stile Chigago Style (17a edizione)
Science Year 1991: A Review of Science and Technology During the 1990 School Year. Chicago: World Book, Inc, 1991.
Citatione MLA (9a ed.)
Science Year 1991: A Review of Science and Technology During the 1990 School Year. World Book, Inc, 1991.
Attenzione: Queste citazioni potrebbero non essere precise al 100%.