http://inst.eecs.berkeley.edu/~selfpace/studyguide/9C.sg/Output/ADTs.in.... [2]
https://www.haskell.org/haskellwiki/Abstract_data_type [3]
http://xlinux.nist.gov/dads/HTML/abstractDataType.html [4]
http://cse.iitkgp.ac.in/pds/notes/ADT.html [5]
http://pages.cs.wisc.edu/~hasti/cs367-1/readings/Introduction/index.html [6]
Links
[1] https://www.hootsgo.org/?q=node/6305
[2] http://inst.eecs.berkeley.edu/~selfpace/studyguide/9C.sg/Output/ADTs.in.C.html
[3] https://www.haskell.org/haskellwiki/Abstract_data_type
[4] http://xlinux.nist.gov/dads/HTML/abstractDataType.html
[5] http://cse.iitkgp.ac.in/pds/notes/ADT.html
[6] http://pages.cs.wisc.edu/~hasti/cs367-1/readings/Introduction/index.html