This edition of the Elucidarius (last version 27 February 2017) contains 3 texts:

1. The Latin original as published by Lefèvre (1954). 
2. The Old Norse translation, based on the edition of Firchow (1992) and normalized by Bjarni Gunnar Ásgeirsson (January 2017).
3. Magnús Eiríksson's Danish translation (1857) of the Old Norse text.

The chapter division follows the edition of the Latin text in the Patrologia Latina (Vol. 172, Paris 1854). A pdf facsimile of this edition is linked to each page of the text (full text in one file here). A pdf facsimile of Eirḱsson's translation is also linked to the digital text (full text in one file here).  

De summa totius christianae theologiae

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Elucidarium – Printed by Johann Weyssenburger, Landshut 1514

Yves Lefèvre. L'Elucidarium et les Lucidaires. Contribution, par l'histoire d'un texte, à l'histoire des croyances religieuses en France au Moyen Age. Paris: E. de Boccard 1954

Magnús Eiríksson, “Brudstykker af den islandske Elucidarius,” in: Annaler for nordisk Oldkyndighed og Historie, Copenhagen 1857, pp. 238–308.

Evelyn Scherabon Firchow. The Old Norse Elucidarius: original text and English translation. Columbia, SC: Camden House 1992. 

• Wikipedia page on the Elucidarium.
• Bibliography in the Geschichtsquellen des deutschen Mittelalters.