Cita APA (7a ed.)

Vethake, H. (1838). The principles of political economy. P. H. Nicklin & T. Johnson.

Cita Chicago Style (17a ed.)

Vethake, Henry. The Principles of Political Economy. Philadelphia: P. H. Nicklin & T. Johnson, 1838.

Cita MLA (8a ed.)

Vethake, Henry. The Principles of Political Economy. P. H. Nicklin & T. Johnson, 1838.