About Arm Contex-A53 pipeline architecture

Hi guys, I am a student and I am trying to learn the architecture of Arm Contex-A53. By going through the technical manual of Contex-A53, I have learned that Contex-A53 is in-order processor, after this I want to understand the pipelined architecture of Contex-A53 in a deeper way. However, after reviewing various official documents, I was unable to find any such architecture diagram. However, I have found other websites and books that have diagrams of the Contex-A53 architecture, and while this helps me learn, I would still like to know if there are official manuals that contain detailed explanations of similar architectures, since official manuals are more authoritative and easier to cite in papers. Here are the architectural diagrams I have seen elsewhere.

Thanks for the answer!