Cita APA (7a ed.)

Ashton, J., & Lord, R. F. (1969). Research, education and extension in agriculture. Oliver and Boyd ; Agricultural Adjustment Unit ; University of Newcastle.

Cita Chicago Style (17a ed.)

Ashton, J., y R. F. Lord. Research, Education and Extension in Agriculture. Edinburgh: Oliver and Boyd ; Agricultural Adjustment Unit ; University of Newcastle, 1969.

Cita MLA (8a ed.)

Ashton, J., y R. F. Lord. Research, Education and Extension in Agriculture. Oliver and Boyd ; Agricultural Adjustment Unit ; University of Newcastle, 1969.