Cita APA (7a ed.)

Singer, H. W., & Ansari, J. A. (1982). Rich and poor countries (3rd ed.). George Allen & Unwin.

Cita Chicago Style (17a ed.)

Singer, H. W., y Javed A. Ansari. Rich and Poor Countries. 3rd ed. London ; Boston ; Sydney: George Allen & Unwin, 1982.

Cita MLA (9a ed.)

Singer, H. W., y Javed A. Ansari. Rich and Poor Countries. 3rd ed. George Allen & Unwin, 1982.