APA (7th ed.) Citation
Miller, W., & Askey, R. (1977). Symmetry and separation of variables: With a forew. by Richard Askey. Addison-Wesley.
Chicago Style (17th ed.) Citation
Miller, Willard, and Richard Askey. Symmetry and Separation of Variables: With a Forew. by Richard Askey. London [usw.]: Addison-Wesley, 1977.
MLA (9th ed.) Citation
Miller, Willard, and Richard Askey. Symmetry and Separation of Variables: With a Forew. by Richard Askey. Addison-Wesley, 1977.
Warning: These citations may not always be 100% accurate.