Reference
Part of speech: verb
Definition: to refer to, to make reference to, to cite to mention
Part of speech: noun
Definition: A relation between objects in which one object designates, or acts as a means by which to connect to or link to, another object. a measurement one can compare to information about a person, provided by someone (a referee) with whom they are well acquainted A previously published written work within academic publishing, used as a source for theory or claims referred to which are used in the text. An object containing information which refers to data stored elsewhere, as opposed to containing the data itself.
Example sentence: A categorical imperative would be one which represented an action as objectively necessary in itself, without reference to any other purpose.
Source
Part of speech: verb
Definition: to obtain or procure; used especially of a business resource
Part of speech: noun
Definition: The person, place or thing from which something (information, goods, etc.) comes or is acquired.Spring; fountainhead; wellhead; any collection of water on or under the surface of the ground in which a stream originates.A reporter's informant.Source code.
Example sentence: Too much self-centered attitude, you see, brings, you see, isolation. Result: loneliness, fear, anger. The extreme self-centered attitude is the source of suffering.