Cita APA (7a ed.)

Hubbard, G. H. (1901). The why of poverty. Abbey Press.

Cita Chicago Style (17a ed.)

Hubbard, George Henry. The Why of Poverty. New York: Abbey Press, 1901.

Cita MLA (8a ed.)

Hubbard, George Henry. The Why of Poverty. Abbey Press, 1901.