Where do I place an exclamation point or a question mark in relation to a parenthetical reference for a paraphrase?

Note: This post relates to content in the eighth edition of the MLA Handbook. For up-to-date guidance, see the ninth edition of the MLA Handbook.

You should place an exclamation point or a question mark after the parenthetical reference for a paraphrase:

Why did Karl Marx say that a commodity is a strange object (47)?

Work Cited

Marx, Karl. Capital: A Critique of Political Economy. Translated by Samuel Moore and Edward Aveling, edited by Frederick Engels, vol. 1, Progress Publishers, 1887, www.marxists.org/archive/marx/works/ download/pdf/Capital-Volume-I.pdf.

It may, however, be better to revise:

Karl Marx said that a commodity is a strange object (47). Why?