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I've found two valid sources for reference #4: "Spash, C. L. (2011) Terrible economics, ecosystems and banking. Environmental Values 20(2): 141-145."
These sources are the publisher's website of the free html version of said article, containing a link to a website providing the free pdf version for it as well[1] and the website itself hosting the free pdf version of the article given above.[2]
The website providing the pdf unfortunately doesn't offer a static link, which could just be copied and pasted into the source text of the criticism of TEEB section, but a dynamic link instead, which changes everytime you retreive the pdf document from the hosting website.
Furthermore, I would also like to suggest that in terms of consistency, the current given Format of reference #4:
"Spash, C. L. (2011) Terrible economics, ecosystems and banking. Environmental Values 20(2): 141-145."
corresponds to the formatting of reference #3:
"Spash, C.L. 2008. How much is that ecosystem in the window? The one with the bio-diverse trail. Environmental Values, vol. 17, no. 2, 259-284"
Thus the new formatting for reference #4 would result in:
"Spash, C. L. 2011. Terrible economics, ecosystems and banking. Environmental Values, vol. 20, no. 2, 141-145".
(I've tried to highlight the corresponding changes that I've made by writing in bold and italic combined.)
Thmshb (talk) 15:51, 27 February 2016 (UTC)Reply
Not done: According to the page's protection level you should be able to edit the page yourself. If you seem to be unable to, please reopen the request with further details. Qed237 (talk) 16:19, 27 February 2016 (UTC)