Παραπομπή APA

Salter, W. E. G. (1969). Productivity and technical changes. Cambridge University Press.

Παραπομπή Chicago Style

Salter, W. E. G. Productivity and Technical Changes. Cambridge University Press, 1969.

Παραπομπή MLA

Salter, W. E. G. Productivity and Technical Changes. Cambridge University Press, 1969.