Citazione Stile APA (7a Edizione)

Davidson, D. A. (1992). The evaluation of land resources (2nd ed.). Longman Scientific & Technical.

Citazione stile Chigago Style (17a edizione)

Davidson, Donald A. The Evaluation of Land Resources. 2nd ed. Harlow, Essex, England: Longman Scientific & Technical, 1992.

Citatione MLA (9a ed.)

Davidson, Donald A. The Evaluation of Land Resources. 2nd ed. Longman Scientific & Technical, 1992.