Gaya APA

Jensen, W, , , G. (1970). Energy and the economy of nations. (1970). : Oxfordshire : G.T. Foulis & Co. Ltd.,.

Gaya MLA

Jensen, W, , , G.. "Energy and the economy of nations.". 1970 : Oxfordshire : G.T. Foulis & Co. Ltd.,, 1970. Text.