Cita APA (7a ed.)

Johnson, H. G. 1. (1971). Aspects of the theory of tariffs. Allen & Unwin.

Cita Chicago Style (17a ed.)

Johnson, Harry Gordon 1923. Aspects of the Theory of Tariffs. London: Allen & Unwin, 1971.

Cita MLA (9a ed.)

Johnson, Harry Gordon 1923. Aspects of the Theory of Tariffs. Allen & Unwin, 1971.