Online encyclopaedias are great for short, concise and correct information. Search by your historical event e.g. Titanic.
Suggested articles include:
It is important to provide evidence of using a variety of reliable resources. Use the online Reference Generator available through the Portal to create your citations. Make sure you alphabetically sort them afterwards.
A sample bibliography for 3 resources suggested on these pages would look like:
Corwin, J 2014, Geography and Early Greece, 2 February, accessed 4 December 2017, <https://www.youtube.com/watch?v=5FVpL4ma8nQ>.
Greece 2017. Britannica School. Retrieved 4 December 2017, from http://school.eb.com.au/levels/middle/article/Greece/274649#201738.toc
Waldron, M 2015, Geography matters in ancient Greece , Raintree, London.