Lua APA (7ú heag.)

Henderson, W., & ed. Engels: Selected writings, History, Economics, Social Cristicism, Philosophy, Letters. Penguin.

Lua i Stíl Chicago (17ú heag.)

Henderson, W.O, agus ed. Engels: Selected Writings, History, Economics, Social Cristicism, Philosophy, Letters. Baltimore: Penguin.

Lua MLA (9ú heag.)

Henderson, W.O, agus ed. Engels: Selected Writings, History, Economics, Social Cristicism, Philosophy, Letters. Penguin.

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