Citazione Stile APA (7a Edizione)

Hills, R. C. (1979). Surveys of free resources: Is there a role in planning and project implementation? Development Studies Centre, The Australian National University.

Citazione stile Chigago Style (17a edizione)

Hills, Rodney C. Surveys of Free Resources: Is There a Role in Planning and Project Implementation? Canberra: Development Studies Centre, The Australian National University, 1979.

Citatione MLA (9a ed.)

Hills, Rodney C. Surveys of Free Resources: Is There a Role in Planning and Project Implementation? Development Studies Centre, The Australian National University, 1979.