The source of information is from http://www.jstor.org/stable/3798312?origin=crossref
This is an academic peer-reviewed journal article. It is a research article.
The article discusses research methods and uses its own data. It is published into a journal. The guidelines for this journal talk about the peer-review process in detail here:
http://www.nacwg.org/JWMguidelines2011.pdf
A reference to this source:
Martz, G. F. 1967. Effects of Nesting Cover Removal on Breeding Puddle Ducks. The Journal of Wildlife Management 31:236.
