APA aipamena

Sharp, C. (1981). The economics of time. Oxford: Martin Robertson.

Chicago Style aipamena

Sharp, Clifford. The Economics of Time. Oxford: Martin Robertson, 1981.

MLA aipamena

Sharp, Clifford. The Economics of Time. Oxford: Martin Robertson, 1981.

Kontuz: berrikusi erreferentzia hauek erabili aurretik.