Procurement

https://en.wikipedia.org/wiki/Procurement
https://www.procurementleaders.com/
https://www.procurify.com/
https://www.gep.com/
https://www.cips.org/
http://www.procurement-academy.com/
https://www.youtube.com/results?search_query=Procurement
https://www.slideshare.net/search/slideshow?searchfrom=header&q=Procurement

Strategic sourcing / Steps / Rules / Videos

http://en.wikipedia.org/wiki/Strategic_sourcing
http://www.iimm.org/knowledge_bank/4_strategic-sourcing.htm
http://www.tpi.net/pdf/papers/Strategic%20Sourcing%20for%20FS%20White%20Paper.pdf
https://www.google.com/search?tbm=vid&hl=en&source=hp&biw=1024&bih=610&q=Strategic+Sourcing

Package

https://en.wikipedia.org/wiki/Package_delivery
https://www.doorman.co/