Cita APA (7a ed.)

Fröman, N., & Fröman, P. O. (2002). Physical problems solved by the phase-integral method. Cambridge University Press.

Cita Chicago Style (17a ed.)

Fröman, Nanny, y Per Olof Fröman. Physical Problems Solved by the Phase-integral Method. Cambridge ; New York: Cambridge University Press, 2002.

Cita MLA (8a ed.)

Fröman, Nanny, y Per Olof Fröman. Physical Problems Solved by the Phase-integral Method. Cambridge University Press, 2002.