Cita APA (7a ed.)

Lange, O. (1944). Price flexibility and employment. Principia Press.

Cita Chicago Style (17a ed.)

Lange, Oskar. Price Flexibility and Employment. Bloomington (Indiana): Principia Press, 1944.

Cita MLA (9a ed.)

Lange, Oskar. Price Flexibility and Employment. Principia Press, 1944.