You do not need to consult additional secondary sources. If you do, this must be acknowledged in the paper. Papers are due at the date and time specified. After that time papers will be considered late and will be penalized. If you foresee special difficulties with the deadline, speak to your TA well in advance.
Plagiarism results in a zero for the work submitted, so it's crucial to understand the concept.
Just as scientists demand complete and accurate information about experiments so that they duplicate and check those experiments, so scholars and readers demand complete information so they can check your use of sources and accuracy in reporting what others said. If there is any question about whether the student's paper is his or her own work, TA's have been directed to bring the paper directly to the professor. Every effort will be made to determine whether the paper is plagiarized. This is an attempt to be fair to the teachers and the other students in the course. When you quote, quote exactly, use quotation marks, and cite the source.