Παραπομπή σε μορφή APA (7η εκδ.)

Ladd, W. (1840). An essay on a congress of nations: For the adjustment of international disputes without resort to arms. Whipple & Damrell.

Παραπομπή σε μορφή Chicago (17η εκδ.)

Ladd, William. An Essay on a Congress of Nations: For the Adjustment of International Disputes Without Resort to Arms. Boston: Whipple & Damrell, 1840.

Παραπομπή σε μορφή MLA (8th εκδ.)

Ladd, William. An Essay on a Congress of Nations: For the Adjustment of International Disputes Without Resort to Arms. Whipple & Damrell, 1840.