Websites
UNDATED ONLINE DOCUMENT
Use an access date rather than n.d. (no date).
National Oceanic and Atmospheric Administration. 2015. "Ocean." United States Department of Commerce. Accessed June 6. http://www.noaa.gov/ocean.html
ONLINE JOURNAL ARTICLE
Online Format with DOI:
** DOI is preferred to URL. Always use DOI if given instead of URL.
Campbell, Alexandra M., Jay Fleisher, Christopher Sinigalliano, James R. White, and Jose V. Lopez. 2015. "Dynamics of Marine Bacterial Community Diversity of the Coastal Waters of the Reefs, Inlets, and Wastewater Outfalls of Southeast Florida." Microbiology Open 4(2): 1-19. doi: 10.1002/mbo3.245.
Online Format without DOI:
Spieler, Richard E. 1971. "A Carp-Goldfish Hybrid with No Caudal Fin." Transactions of the Kansas Academy of Science 74 (3/4): 342-343. http://nsuworks.nova.edu/occ_facarticles/215/