Cita APA (7a ed.)

Duffus, R. L. (1930). Books: Their place in a democracy. Houghton Mifflin company.

Cita Chicago Style (17a ed.)

Duffus, R. L. Books: Their Place in a Democracy. Boston: Houghton Mifflin company, 1930.

Cita MLA (8a ed.)

Duffus, R. L. Books: Their Place in a Democracy. Houghton Mifflin company, 1930.