Παραπομπή σε μορφή APA (7η εκδ.)

Whewell, W. (1855). Of the plurality of the worlds: An essay : also, a dialogue on the same subject (4rth edition.). John W. Parker and Son.

Παραπομπή σε μορφή Chicago (17η εκδ.)

Whewell, William. Of the Plurality of the Worlds: An Essay : Also, a Dialogue on the Same Subject. 4rth edition. London: John W. Parker and Son, 1855.

Παραπομπή σε μορφή MLA (8th εκδ.)

Whewell, William. Of the Plurality of the Worlds: An Essay : Also, a Dialogue on the Same Subject. 4rth edition. John W. Parker and Son, 1855.