Another key element of Bushidō is politeness (Nitobe, 1982). The Japanese language and culture has adapted to this important feature and has approximately five forms and levels of politeness, all used in different circumstances, as well as a complex method for distinguishing the social hierarchy (小川誉子美・前田直子 (Ogawa Yoshiko; Maeda Naoko), 2003).
Both of the sources were in the same paragraph, but used to identify where I got the opinions, etc. for each part, rather than where I got all my ideas from for the paragraph as a whole.
If it's multiple authors for the same source, you can see how I did that (but perhaps check the link I gave you to see how it's used in MLA), but if I refer to them (like "so-and-so said ~~"), you put all the authors' names, or if there is an original author (say, from a translated text), I've been told to put just the original author.

Also, if you use Windows and have a Microsoft Word that came out in the last couple of years, there's a reference tab that can help sort your sources for you (under manage sources, I think) - it has the source style of MLA.
Then, at the appropriate points in the text, you select "insert citation".

I hope that helps clear things up.

Also, if it's general information that you can look up, you don't normally have to source that (eg. "The first wave of the Black Death hit Europe in the mid 14th century" - no source would be required, 'cause it's general information). It's mainly (but not limited to) ideas, perspective and opinions of the original author that you have to source (eg. "The Black Death in the mid 14th century had deviasting and lasting effects on Europe, but also led to great advances in technology (Name (date), p~~-~~)." -> Then have the full details in the bib.).

Now I understand. Thank you very much!