Hohfeld, J. M. (1950). An experiment employing two method of teaching Spanish to college freshmen. [s.n.].
Citazione stile Chigago Style (17a edizione)Hohfeld, John Maurice. An Experiment Employing Two Method of Teaching Spanish to College Freshmen. Philadelphia: [s.n.], 1950.
Citatione MLA (9a ed.)Hohfeld, John Maurice. An Experiment Employing Two Method of Teaching Spanish to College Freshmen. [s.n.], 1950.
Attenzione: Queste citazioni potrebbero non essere precise al 100%.