Cita APA (7a ed.)

Knight, F. H. (1944). Diminishing returns from investment. [s.n.].

Cita Chicago Style (17a ed.)

Knight, Frank Hyneman. Diminishing Returns from Investment. [S.l.]: [s.n.], 1944.

Cita MLA (9a ed.)

Knight, Frank Hyneman. Diminishing Returns from Investment. [s.n.], 1944.