e-Libro (Miami, Estados Unidos). (1998). Liberalism and affirmative obligation.
Chicago Style (17th ed.) Citatione-Libro (Miami, Estados Unidos). Liberalism and Affirmative Obligation. 1998.
MLA (9th ed.) Citatione-Libro (Miami, Estados Unidos). Liberalism and Affirmative Obligation. 1998.
Warning: These citations may not always be 100% accurate.