Cita APA (7a ed.)

Einzig, P. (1937). The theory of forward exchange. MacMillan [etc.].

Cita Chicago Style (17a ed.)

Einzig, Paul. The Theory of Forward Exchange. London [etc.]: MacMillan [etc.], 1937.

Cita MLA (9a ed.)

Einzig, Paul. The Theory of Forward Exchange. MacMillan [etc.], 1937.