Laplace (1951) claims that...
Last name, Initial(s). (Year). Title (edition.). (Initial/s, last name, Trans.). Place:
Publisher. (Original work published yyyy).
Laplace, P. S. (1951). A philosophical essay on probabilities. (F. W. Truscott & F. F. L. Emory, Trans.).
New York: Dover. (Original work published 1814).
Note: When you cite a republished work, like the one above, in your text it should appear with both dates: Laplace (1814/1951).