Gaya APA
Abler, R., Adams, J, S. (1971).
Spatial organization : the geographer`s view of the world .
London:
Prentice-Hall.
Gaya MLA
Abler, Ronald., Adams, John, S.
"Spatial organization : the geographer`s view of the world".
London:
Prentice-Hall,
1971.
Text.