Orthodox Eastern Church & Cummings, D. (1957). The rudder (Pedalion) of the metaphorical ship of the one holy Catholic and apostolic church of Orthodox Christians =: Or, All the sacred and divine canons ... as embodied in the original Greek text for the sake of authenticity and explained in the vernacular by way of rendering them more intelligible to the less educated. Orthodox Christian Educational Society.

Orthodox Eastern Church agus Denver Cummings. The Rudder (Pedalion) of the Metaphorical Ship of the One Holy Catholic and Apostolic Church of Orthodox Christians =: Or, All the Sacred and Divine Canons ... as Embodied in the Original Greek Text for the Sake of Authenticity and Explained in the Vernacular by Way of Rendering Them More Intelligible to the Less Educated. Chicago, Ill: Orthodox Christian Educational Society, 1957.

Orthodox Eastern Church agus Denver Cummings. The Rudder (Pedalion) of the Metaphorical Ship of the One Holy Catholic and Apostolic Church of Orthodox Christians =: Or, All the Sacred and Divine Canons ... as Embodied in the Original Greek Text for the Sake of Authenticity and Explained in the Vernacular by Way of Rendering Them More Intelligible to the Less Educated. Orthodox Christian Educational Society, 1957.