Schrag, Z. (2021). The Princeton guide to historical research. Princeton University Press.
Cita Chicago (17th ed.)Schrag, Zachary. The Princeton Guide to Historical Research. Princeton, New Jersey, USA; Oxford, UK: Princeton University Press, 2021.
Cita MLA (9th ed.)Schrag, Zachary. The Princeton Guide to Historical Research. Princeton University Press, 2021.
Atenció: Aquestes cites poden no estar 100% correctes.