Citazione Stile APA (7a Edizione)

Halmos, P. R. (1967). A Hilbert space problem book. American Book.

Citazione stile Chigago Style (17a edizione)

Halmos, Paul Richard. A Hilbert Space Problem Book. Nueva York: American Book, 1967.

Citatione MLA (9a ed.)

Halmos, Paul Richard. A Hilbert Space Problem Book. American Book, 1967.