Gaya APA
Blakemore, R, A, L, M. (2008).
Geographic information: value, pricing, production, and consumption .
Boca Raton:
CRC Press.
Gaya MLA
Blakemore, Roger, A., Longhorn;, Michael.
"Geographic information: value, pricing, production, and consumption".
Boca Raton:
CRC Press,
2008.
Text.