Citazione APA

Ansari, J. A., & Singer, H. W. (1978). Rich and poor countries. George Allen And Unkin.

Stile di citazione Chicago

Ansari, J A., e H W. Singer. Rich and Poor Countries. London: George Allen And Unkin, 1978.

Citazione MLA

Ansari, J A., e H W. Singer. Rich and Poor Countries. George Allen And Unkin, 1978.