Cite

ALS to Samuel Hartlib (d. 1670?); n.p.

MLA

ALS to Samuel Hartlib (d. 1670?); N.p. 1656. https://collections.library.yale.edu/catalog/10034171.

APA, 6th edition

ALS to Samuel Hartlib (d. 1670?); n.p. (1656). https://collections.library.yale.edu/catalog/10034171.