Essay Structure and Language

 http://www.massey.ac.nz/massey/fms/Student%20services/Student%20Learning%20Development%20Service/Documents/Albany/Extramural/Essay%20Writing%20Workshop%20Notes.pdf

http://www.monash.edu.au/lls/llonline/writing/medicine/psychology/essay-structure/3.xml

http://web.anglia.ac.uk/anet/students/documents/2010/helpful-guide-to-essay-writing.pdf

https://www4.ntu.ac.uk/edu/document_uploads/140209.pdf

with some vocabulary 

http://academicwriting.wikidot.com/for-and-against-essays

for the rest of the site, go here and then click on the left

http://academicwriting.wikidot.com/

Conclusion and some vocabulary

http://www.smartmontgomery.com/words-expressions-to-help-you-conclude-your-essay/

More language to use to structure your writing

https://www.oxford-royale.co.uk/articles/words-phrases-good-essays.html

Language in English (and a little French!)

https://www.rpn.ch/ljp/perso/devenogesS/docpub/ACTIVITIES/Usefulexpressionsessay.pdf

General language

https://www.scribbr.com/academic-writing/taboo-words/

https://www.vocabulary.com/lists/183677

dictionaries

https://www.amazon.co.uk/Dictionary-International-Relations-Reference-Paperback/dp/B00IGYXWI4/ref=pd_lpo_sbs_14_t_1?_encoding=UTF8&psc=1&refRID=23X8XWFME73QCBPD5PV7

https://www.amazon.it/Dizionario-internazionali-Dictionary-international-Inglese-italiano-english-italian/dp/8882343510

Essay example, though obviously you don't need all the academic references (unless you have studied the issue and have some)

https://www.ukessays.com/services/example-essays/international-relations/ngos-in-global-politics-and-state-sovereignty.php

Recognising structure in reading (it might help you to think about your writing)

https://atarnotes.com/language-analysis-essay-structure/