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: There is a fountain of youth: it is your mind, your talents, the creativity you bring to your life and the lives of people you love. When you learn to tap this source, you will truly have defeated age.
Reference
Part of speech: verb
Definition: to refer to, to make reference to, to citeto 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 toinformation about a person, provided by someone (a referee) with whom they are well acquaintedA 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: My conscious life has all been in Kenya, and it's my point of reference. But going back to Mexico was very formative.