APA (7th ed.) Zitazioa

Highsmith, R. M. (1963). Geography of Commodity production (2nd ed.). Oregon State univ..

Chicago Style (17th ed.) Zitazioa

Highsmith, Richard M. Geography of Commodity Production. 2nd ed. Oregon: Oregon State univ., 1963.

MLA (9th ed.) Zitazioa

Highsmith, Richard M. Geography of Commodity Production. 2nd ed. Oregon State univ., 1963.