General Meeting of the Commission on Methods of Economic Regionalization International Geographical Union Utrecht, International Geographical Union. Commission on Methods of Economic Regionalization, & Wróbel, A. (1962). Economic regionalization: Materials of the First General Meeting of the Commission held in Utrecht, the Netherlands, from 8 till 9. Sept. 1961 = Regionalizacja ekonomiczna : materiały z I Zebrania Ogólnego Komisji w Utrechcie, Holandia, w dniach 8-9. IX 1961. Polska Akademia Nauk. Instytut Geografii.
Citazione stile Chigago Style (17a edizione)General Meeting of the Commission on Methods of Economic Regionalization International Geographical Union Utrecht, International Geographical Union. Commission on Methods of Economic Regionalization, e Andrzej Wróbel. Economic Regionalization: Materials of the First General Meeting of the Commission Held in Utrecht, the Netherlands, from 8 Till 9. Sept. 1961 = Regionalizacja Ekonomiczna : Materiały Z I Zebrania Ogólnego Komisji W Utrechcie, Holandia, W Dniach 8-9. IX 1961. Warszawa: Polska Akademia Nauk. Instytut Geografii, 1962.
Citatione MLA (9a ed.)General Meeting of the Commission on Methods of Economic Regionalization International Geographical Union Utrecht, et al. Economic Regionalization: Materials of the First General Meeting of the Commission Held in Utrecht, the Netherlands, from 8 Till 9. Sept. 1961 = Regionalizacja Ekonomiczna : Materiały Z I Zebrania Ogólnego Komisji W Utrechcie, Holandia, W Dniach 8-9. IX 1961. Polska Akademia Nauk. Instytut Geografii, 1962.