James, P. E. (1980). One word divided, a geographer looksatthe modern world (3ª ed.). John Wiley and Sons.
Dyfyniad Arddull ChicagoJames, Preston E. One Word Divided, a Geographer Looksatthe Modern World. 3ª ed. John Wiley and Sons, 1980.
Dyfyniad MLAJames, Preston E. One Word Divided, a Geographer Looksatthe Modern World. 3ª ed. John Wiley and Sons, 1980.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.