Jackson, R. H. (1986). World regional geography: Issues for today (2ª ed.). John Wiley and Sons.
Cita Chicago (17th ed.)Jackson, Richard H. World Regional Geography: Issues for Today. 2ª ed. John Wiley and Sons, 1986.
Cita MLA (9th ed.)Jackson, Richard H. World Regional Geography: Issues for Today. 2ª ed. John Wiley and Sons, 1986.
Atenció: Aquestes cites poden no estar 100% correctes.