James, P. E. (1980). One word divided, a geographer looksatthe modern world (3ª ed.). John Wiley and Sons.
Chicago (17e ed.) BronvermeldingJames, Preston E. One Word Divided, a Geographer Looksatthe Modern World. 3ª ed. John Wiley and Sons, 1980.
MLA (9e ed.) BronvermeldingJames, Preston E. One Word Divided, a Geographer Looksatthe Modern World. 3ª ed. John Wiley and Sons, 1980.
Let op: Deze citaties zijn niet altijd 100% accuraat.