Grubbs, F. (1988). Nine Points for Writing Social Studies Research Papers for History Day and Other Competitions.
Citazione stile Chigago Style (17a edizione)Grubbs, Frank. Nine Points for Writing Social Studies Research Papers for History Day and Other Competitions. 1988.
Citatione MLA (9a ed.)Grubbs, Frank. Nine Points for Writing Social Studies Research Papers for History Day and Other Competitions. 1988.
Attenzione: Queste citazioni potrebbero non essere precise al 100%.