(1994). The world of science. S. Chand.
Chicago Style (17th ed.) ZitazioaThe World of Science. New Delhi: S. Chand, 1994.
MLA (9th ed.) ZitazioaThe World of Science. S. Chand, 1994.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.
(1994). The world of science. S. Chand.
Chicago Style (17th ed.) ZitazioaThe World of Science. New Delhi: S. Chand, 1994.
MLA (9th ed.) ZitazioaThe World of Science. S. Chand, 1994.