Anyone really need any of these books??

So my school has a long list of required textbooks and I am wondering if I will really need the following textbooks: (and if it is okay to go with an older edition for some)

Nursing Diagnosis Handbook, Ackley, 9th ed.
Nursing: Scope & Standards of Practice, ANA, 2nd ed.
Nursing's Social Policy Statement, ANA, 3rd ed.
Nursing Interventions and Clinical Skills, Perry, 5th ed.
Guide to Code of Ethics, Fowler, 2010 reissue