Citação norma APA

Hohfeld, J. M. (1950). An experiment employing two method of teaching Spanish to college freshmen. [s.n.].

Citação norma Chicago

Hohfeld, John Maurice. An Experiment Employing Two Method of Teaching Spanish to College Freshmen. Philadelphia: [s.n.], 1950.

Citação norma MLA

Hohfeld, John Maurice. An Experiment Employing Two Method of Teaching Spanish to College Freshmen. [s.n.], 1950.

Nota: a formatação da citação pode não corresponder 100% ao definido pela respectiva norma.