Franklin

MLA

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

APA

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

Chicago

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