If you want sources with a legal historical perspective, here is a starting point in relation to some of the old laws and processes for this (all in Danish).
Codex Holmiensis C37, Law of Jutland (1241)
Contents: Part 1 (ca. 1280): Jutland Law (1241) with two inserted texts (Odense judgment 1245 and Erik Klipping's bill 1276).
2nd part (Erik Klipping's decree for Jutland 1284, the same confirmation 1282, as well as Erik of Pommerns Gårdsret 1417)
Jutland Law, 1st book, 2nd book, 3rd book.
Chronological Register of the Royal Ordinances and Open Letters
Digitized version of Schous Register of Ordinances. By Jacob Henric Schou.
What is plagiarism and how can you avoid plagiarising? At the site Plagiarism for students you can find the answers to those questions.
How do you refer and make references? In ”Retsdogmatisk forskning i praksis” (in Danish) by Lars Henrik Gam Madsen, you can find examples of how to make notes, references etc.
How do you make a unique reference to "Folketingstidende" and "Rigsdagstidende"? At Folketingstidende.dk you can get a detailed guide (in Danish): Om at henvise til Folketingstidende.
Each semester the library creates semester shelves at the library for those materials that are used in the courses. The materials are intended for copying at the library and they cannot be borrowed. You can check the library database to see if there should be a circulation copy available.
At Bartholins Allé the semester shelves are right across the information desk on the first floor.
An orange label marks the books on Law's semester shelves. To assure that most students have access to and can use the books, these books can only be used on the first floor at the library.
All Master's theses published by the Department of Law are indexed and stored at Aarhus University Library, School of Business and Social Sciences, Bartholins Allé.