APA Citation
Goddard, Robert Hutchings,. Robert H. Goddard letter to Nils A. Riffolt, dated Shoreham Hotel, H Street Northwest at Fifteenth, Washington, D.C., 16 July 1922. Retrieved from https://library.si.edu/digital-library/book/roberthgoddardl00godd
MLA Citation
Goddard, Robert Hutchings,. Robert H. Goddard letter to Nils A. Riffolt, dated Shoreham Hotel, H Street Northwest at Fifteenth, Washington, D.C., 16 July 1922. https://library.si.edu/digital-library/book/roberthgoddardl00godd
Chicago
Goddard, Robert Hutchings,. Robert H. Goddard letter to Nils A. Riffolt, dated Shoreham Hotel, H Street Northwest at Fifteenth, Washington, D.C., 16 July 1922. https://library.si.edu/digital-library/book/roberthgoddardl00godd
Warning: These citations may not always be complete (especially for serials).