Sylvester, D., & Burrill, T. (1976). What is history? (Teacher's guide.). Holmes McDougall.
Cita Chicago Style (17a ed.)Sylvester, David, y Ted Burrill. What Is History? Teacher's guide. Edinburgh: Holmes McDougall, 1976.
Cita MLA (9a ed.)Sylvester, David, y Ted Burrill. What Is History? Teacher's guide. Holmes McDougall, 1976.
Precaución: Estas citas no son 100% exactas.