Cita APA (7a ed.)

Lange, O. (1945). Price flexibility and empoyment. Principia Press.

Cita Chicago Style (17a ed.)

Lange, Oskar. Price Flexibility and Empoyment. Bloomington [Indiana]: Principia Press, 1945.

Cita MLA (9a ed.)

Lange, Oskar. Price Flexibility and Empoyment. Principia Press, 1945.