Chosen at random from all the resources listed:
- T552_1 Systems Diagramming - OpenLearn by -- Uknown -- -- Uknown --
- UML for Systems Engineering by Jon Holt
- Introduction to Systems Engineering by Andrew P. Sage, James E. Armstrong
- System Requirements Analysis by Jeffrey O Grady
- Systems One : An Introduction to Systems Thinking by Draper L. Kauffman