这三篇文章是期刊论文吗

Project Management in an Uncertain Environmenthttps://www.sciencemag.org/careers/2002/08/project-management-uncertain-environment

Project Management and Discovery
https://www.sciencemag.org/careers/2002/09/project-management-and-discovery

How to Run a Drug Project: Are There Any Rules at All?

https://blogs.sciencemag.org/pipeline/archives/2014/07/14/how_to_run_a_drug_project_are_there_any_rules_at_all

以上三篇文章是期刊论文吗？是哪一期的？第几页？
怎样引用。
有没有期刊格式的pdf?

Portny S. Project management in an uncertain environment[J]. Next Wave, 2002, 23.
只找到了第一篇的，没有PDF可以下载，希望对你有帮助