Asimov, I. (1991). Science year. 1992. The world book annual science supplement. A review of science and technology. During the 1991 school year ([1st ed.].). World Book.
Citace podle Chicago (17th ed.)Asimov, Isaac. Science Year. 1992. The World Book Annual Science Supplement. A Review of Science and Technology. During the 1991 School Year. [1st ed.]. Chicago: World Book, 1991.
Citace podle MLA (9th ed.)Asimov, Isaac. Science Year. 1992. The World Book Annual Science Supplement. A Review of Science and Technology. During the 1991 School Year. [1st ed.]. World Book, 1991.
Upozornění: Tyto citace jsou generovány automaticky. Nemusí být zcela správně podle citačních pravidel..