Important Elements:
The basic format would be:
Last Name Initials[period] Year[period] Article title[period] Abbreviated Journal Title[period] Volume(issue)[colon]1st page number[hyphen]last page number[period]
Online Material
The basic rules for citing do not differ for internet items from what is required for print. Simply listing a URL is not sufficient.
Online Scholarly Article
Savage E et al. 2005. Mumps outbreaks across England and Wales in 2004: observational study. BMJ. 330(7500):1119-1120. https://doi.org/10.1136/bmj.330.7500.119
Article in a scholarly journal
Cox J, Engstrom RT. 2001. Influence of the spatial pattern of conserved lands on the persistence of a large population of red-cockaded woodpeckers. Biol Conserv. 100(1):137-150.
Article in Conference Proceedings
He K, Zhang X, Ren S, Sun J. 2019. Deep residual learning for image recognition. In: Proceedings of the 29th IEEE Computer Society Conference on Computer Vision and Pattern Recognition (CVPR); 2016 Jun 26 - Jul 1; Las Vegas, NV, United States. IEEE Computer Society. p 770-778. https://doi.org/10.1109/CVPR.2016.90
Technical Report
Page E, Harney JM. 2001. Health hazard evaluation report. National Institution of Occupational Safety and Health. Report No.: HETA2000-0139-2824. https://www.cdc.gov/niosh/hhe/reports/pdfs/2000-0139-2824.pdf
Article in a daily newspaper
Yoon CK. 2000 Dec 26. DNA clues improve outlook for red wolf. The New York Times (New York Ed). Sect F:10.
Article in a daily newspaper consulted online
Zimmer C. 2021 Apr 9 [updated 2021 Apr 27]. To speed vaccination, some call for delaying second shots. The New York Times. https://www.nytimes.com/2021/04/09/health/covid-vaccine-second-dose-delay.html