APA-Zitierstil (7. Ausg.)
(1991). Science year 1991: A review of science and technology during the 1990 school year. World Book, Inc.
Chicago-Zitierstil (17. Ausg.)
Science Year 1991: A Review of Science and Technology During the 1990 School Year. Chicago: World Book, Inc, 1991.
MLA-Zitierstil (9. Ausg.)
Science Year 1991: A Review of Science and Technology During the 1990 School Year. World Book, Inc, 1991.
Achtung: Diese Zitate sind unter Umständen nicht zu 100% korrekt.