Citazione Stile APA (7a Edizione)

Kallio, M., Propoj, A. I., & Seppälä, R. (1985). A model for the forest sector. International Institute for Applied Systems Analysis.

Citazione stile Chigago Style (17a edizione)

Kallio, Markku, Anatolij Ivanovič Propoj, e Risto Seppälä. A Model for the Forest Sector. Laxenburg: International Institute for Applied Systems Analysis, 1985.

Citatione MLA (9a ed.)

Kallio, Markku, et al. A Model for the Forest Sector. International Institute for Applied Systems Analysis, 1985.