P.B. Van Trump article "Mount Rainier's Three Historic Native Guides," which appeared in the Mountaineer's Club 1915 newsletter, October 19, 1915

Chicago citation style
Van Trump, P.B.. P.B. Van Trump article "Mount Rainier's Three Historic Native Guides," which appeared in the Mountaineer's Club 1915 newsletter, October 19, 1915. 1915. Retrieved from the Digital Public Library of America, http://cdm16786.contentdm.oclc.org/cdm/ref/collection/pioneerlife/id/14380. (Accessed October 16, 2018.)
APA citation style
Van Trump, P.B., (1915) P.B. Van Trump article "Mount Rainier's Three Historic Native Guides," which appeared in the Mountaineer's Club 1915 newsletter, October 19, 1915. Retrieved from the Digital Public Library of America, http://cdm16786.contentdm.oclc.org/cdm/ref/collection/pioneerlife/id/14380
MLA citation style
Van Trump, P.B.. Retrieved from the Digital Public Library of America <http://cdm16786.contentdm.oclc.org/cdm/ref/collection/pioneerlife/id/14380>.
Note: These citations are programmatically generated and may be incomplete.