it is ALWAYS important to cites ALL of your sourses to avoid plagiarism. I normally at the end of my paper make a new paragraph and title it "Works Cited". type citation machine into google for more help writing a fromal citation. Remember most junior and high schools only allow certan citation styles but your best bet is either APA or MLA. hope this helped.
The third option is correct: "Art and math are courses architecture students must have on their schedules."
The other two uses the word "their" when referring to a single thing/person. The correct word should be: "Each architecture student must plan his/her high school and college courses carefully." and "Every school of architecture sets its own specific requirements."
I need the passage to answer sorry I can't comment on your question either so sorry
