I am doing a term paper on the subject of minimum spanning trees algorithms, I need to cite "Shortest connection networks and some generalization" paper for the prim's algorithm made by Prim, after searching I found a manuscript of the paper. My question is, can I cite the paper? is this allowed in the citing formats?
Of course you can cite unpublished manuscripts; this is regularly done in academia. However, the important issue is that you must appropriately indicate that it is an unpublished manuscript, and cite (if possible) where the manuscript was found. This will allow for due consideration of the work in context.