Cita APA (7th ed.)

Bossing, N. L. (1944). Progressive methods of teaching in secondary school. Houghton Mifflin.

Cita Chicago (17th ed.)

Bossing, Nelson L. Progressive Methods of Teaching in Secondary School. Houghton Mifflin, 1944.

Cita MLA (9th ed.)

Bossing, Nelson L. Progressive Methods of Teaching in Secondary School. Houghton Mifflin, 1944.

Atenció: Aquestes cites poden no estar 100% correctes.