APA aipamena

(1977). Human activity system: Its spatiotemporal structure. Tokyo: University of Tokyo Press.

Chicago Style aipamena

Human Activity System: Its Spatiotemporal Structure. Tokyo: University of Tokyo Press, 1977.

MLA aipamena

Human Activity System: Its Spatiotemporal Structure. Tokyo: University of Tokyo Press, 1977.

Kontuz: berrikusi erreferentzia hauek erabili aurretik.