APA aipamena

(1987). National patterns of science and technology resources: 1987. Washington.

Chicago Style aipamena

National Patterns of Science and Technology Resources: 1987. Washington, 1987.

MLA aipamena

National Patterns of Science and Technology Resources: 1987. Washington, 1987.

Kontuz: berrikusi erreferentzia hauek erabili aurretik.