APA Citation
Stephenson, George,. George Stephenson letter to Robert Stephenson, his son, dated Liverpool, 5 April 1828. Retrieved from https://library.si.edu/digital-library/book/georgestephenso00step
MLA Citation
Stephenson, George,. George Stephenson letter to Robert Stephenson, his son, dated Liverpool, 5 April 1828. https://library.si.edu/digital-library/book/georgestephenso00step
Chicago
Stephenson, George,. George Stephenson letter to Robert Stephenson, his son, dated Liverpool, 5 April 1828. https://library.si.edu/digital-library/book/georgestephenso00step
Warning: These citations may not always be complete (especially for serials).