For a research paper, you have just compiled a stack of resources in your school library. which aspect would be best to consider when determining each source’s validity?

A bibliographic reference is a minimum set of data that allows the identification of a published or unpublished source or a part of it. By publishing both monographs, collective works, conference proceedings and corresponding communications, journal articles, newspaper articles, cartographic material, video, photography or musical scores, for example. The guidelines for making references are set out in the ISO 690 standard.

Appointments have several important purposes: to defend intellectual honesty (or avoid plagiarism), to attribute previous or non-original work and ideas to the correct sources to allow the reader to independently determine whether the material being referenced supports the author's argument and how he affirmed it, and to help the reader measure the strength and validity of the material the author has used.

Any appointment to another work or publication must be conveniently expressed; either at the bottom of the page, at the end of the chapter or section, or at the end of the document in question.

it was certainly a debatable decision, mainly because it was based primarily on political - and not on legal or social - views. since the congress at that time was led by members of the republican party, and the territory that the tribes wanted to turn into an exclusively indian state was predominantly democratic, the proposal (as expressed in the constitution) did not succeed, but the constitution itself proved to be of crucial importance in the creation of the state of oklahoma, and, most importantly, it guaranteed the involvement of representatives of the indian tribes in the government of the future joint state.  

as a member of congress, i would have voted to ratify the constitution, or at least to have it tabled. ignoring it was an interested and partial decision.