Gaya APA
Waltham, T. et al
(2005).
Sinkholes and Subsidence
(
1st ed.)
.
Berlin, Heidelberg:
Springer.
Gaya MLA
Waltham, Tony.. et al.
"Sinkholes and Subsidence".
1st ed.
Berlin, Heidelberg:
Springer,
2005.
E Book.