APA (7th ed.) Citation

BOAS, M. L. (1983). Mathematical methods in the psysical sciences.-- Ed. 2. John Wiley and Sons.

Chicago Style (17th ed.) Citation

BOAS, Mary L. Mathematical Methods in the Psysical Sciences.-- Ed. 2. New York: John Wiley and Sons, 1983.

MLA (9th ed.) Citation

BOAS, Mary L. Mathematical Methods in the Psysical Sciences.-- Ed. 2. John Wiley and Sons, 1983.