Referencing is a practice of acknowledging other peoples works, ideas, sources used in a paper, assignment, report and conference papers in academic writing.
Turnitin is an internet based tool used to check and detect plagiarism in an essay or any kind of academic related document. Its a licensed based software which universities and schools obtain through subscription.
To use Turnitin you must first get a code from your supervisor/lecturer before you register as a student as you will not be able to complete registration without this code.
A referencing style is the preferred format for creating references to sources of information. Format includes the order of elements of a reference as well as punctuation. Unfortunately there is no universal style and every discipline and journal has its own preferred style.
Plagiarism is not just about copying a classmate's assignment but also taking someone else's ideas and writings from books, journals and websites and pretending they are your own. In the academic environment it is essential to indicate where you got your information and ideas from - your lecturers want to see what you have read.