Bucknell Citation Guides
Williams College Citation Guides
Zotero - citation generator and manager tool
Primary sources in the Sciences are not exactly like primary sources in history or literature.
Primary sources are most often found as journal articles, and:
Examples of primary sources include:
Secondary sources may also be useful, but you should be able to distinguish them from primary sources. These typically involve reviews of the primary literature or editorial writing.
Examples of these secondary sources are: