Gaya APA
Gatrell, J, D. et al (2005).
Research Design and Proposal Writing in Spatial Science (1st ed.).
Berlin, Heidelberg:
Springer.
Gaya MLA
Gatrell, Jay, D.. et al.
"Research Design and Proposal Writing in Spatial Science".
1st ed.
Berlin, Heidelberg:
Springer,
2005.
E Book.