Cita APA (7a ed.)

Cassel, G. (1921). The world's monetary problems: Two memoranda. Constable.

Cita Chicago Style (17a ed.)

Cassel, Gustav. The World's Monetary Problems: Two Memoranda. London [etc.]: Constable, 1921.

Cita MLA (9a ed.)

Cassel, Gustav. The World's Monetary Problems: Two Memoranda. Constable, 1921.