James, P. E., & Martin, G. J. (1981). All possible worlds: A history of geographical ideas (2nd ed.). John Wiley & Sons.
Chicago-čujuhus (17. p.)James, Preston Everett, juo Geoffrey J. Martin. All Possible Worlds: A History of Geographical Ideas. 2nd ed. New York: John Wiley & Sons, 1981.
MLA-čujuhus (9. p.)James, Preston Everett, juo Geoffrey J. Martin. All Possible Worlds: A History of Geographical Ideas. 2nd ed. John Wiley & Sons, 1981.
Muitte dárkkistit čujuhemiid riektatvuođa, ovdal go geavahat daid iežat deavsttas.