You are reading a journal of a professional genealogy organization.  There are many citations throughout the articles.  How did the authors know how to create the citations?

There is more than one way to write a citation.  However, the book that is used by many professional genealogists is Evidence Explained by Elizabeth Shown Mills.  The book not only guides one on how to write a citation.  The book also explains the different types of evidence and the different types of sources. And, the book explains so much more!

I recommend that you examine the book.  I do not research without it!