Cita APA (7a ed.)

Matthews, F. (1921). Commercial commodities. Sir Isaac Pitman & Sons.

Cita Chicago Style (17a ed.)

Matthews, Frank. Commercial Commodities. London [etc.]: Sir Isaac Pitman & Sons, 1921.

Cita MLA (9a ed.)

Matthews, Frank. Commercial Commodities. Sir Isaac Pitman & Sons, 1921.