Which citation for a website is correct?

Question

Answer

University of Pixy. 2021.  How to plan and write
essays .  http://www.pixy.ac ..../lli/PDF/Essays.pdf  (Accessed 7 June
2023).

Answer

How to plan and write essays. University of Pixy. March
2021.  http://www2.hull.ac ..../lli/PDF/Essays.pdf .

Answer

University of Pixy. (2021).  How to plan and write
essays .  http://www2.pixy.ac ..../lli/PDF/Essays.pdf 
(Accessed on the 7th of June).

Answer

Univ. of Pixy.  How to plan and write essays .
Available online at  www2.pixy.ac.…/lli/PDF/Essays.pdf  (Retrieved 7 June 2023).

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