Letter from PRG Redshaw to D Wendholt regarding cigarette tracing

Chicago citation style
Redshaw, PRG, Redshaw, Peter. Letter from PRG Redshaw to D Wendholt regarding cigarette tracing. 2000 November 17. Retrieved from the Digital Public Library of America, https://industrydocuments.library.ucsf.edu/tobacco/docs/#id=xypk0189. (Accessed December 10, 2018.)
APA citation style
Redshaw, PRG, Redshaw, Peter, (2000 November 17) Letter from PRG Redshaw to D Wendholt regarding cigarette tracing. Retrieved from the Digital Public Library of America, https://industrydocuments.library.ucsf.edu/tobacco/docs/#id=xypk0189
MLA citation style
Redshaw, PRG, Redshaw, Peter. Retrieved from the Digital Public Library of America <https://industrydocuments.library.ucsf.edu/tobacco/docs/#id=xypk0189>.
Note: These citations are programmatically generated and may be incomplete.