Open Scripting Architecture Reference
Have a look at https://applescriptlibrary.wordpress.com or use the search engine of your choice. The exact document you ask is here:


https://applescriptlibrary.files.wordpress.com/2013/11/open-scripting-architecture.pdf


It's listed as legacy and from 2007. See my comment above about carbon API such as this being deprecated when 10.8 Mountain Lion was released. It might be better to just use the current guide you linked above unless you have specific needs to do research or support older OS and tools.