Citazione Stile APA (7a Edizione)

Labriola, A. (1908). Essays on the materialistic conception of history. C.H. Kerr & Company.

Citazione stile Chigago Style (17a edizione)

Labriola, Antonio. Essays on the Materialistic Conception of History. Chicago: C.H. Kerr & Company, 1908.

Citatione MLA (9a ed.)

Labriola, Antonio. Essays on the Materialistic Conception of History. C.H. Kerr & Company, 1908.