APA (7th ed.) Citation

Harris, G. T. (1977). Forces of change in subsistence agriculture, Papua New Guineaa. Economics Dept., University of Papua New Guinea.

Chicago Style (17th ed.) Citation

Harris, Geoff T. Forces of Change in Subsistence Agriculture, Papua New Guineaa. [Port Moresby]: Economics Dept., University of Papua New Guinea, 1977.

MLA (9th ed.) Citation

Harris, Geoff T. Forces of Change in Subsistence Agriculture, Papua New Guineaa. Economics Dept., University of Papua New Guinea, 1977.