Question

What are some credible sources that I can get scientific journals?

Answer 1

I'd recommend trying a university library. I'm guessing you're not a student, so you probably won't be able to take advantage of the online access that students often enjoy, but many universities have hard copies of the journals as well which may well be accessible to the general public. Alternately, you can subscribe to a journal yourself or pay for individual articles, but they can be very expensive.

Answer 2

Thank you Lark

Answer 3

http://www.doaj.org/doaj?func=home&uiLanguage=en
Might be of use :)

Answer 4

Pubmed.