APA (7e ed.) Bronvermelding

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

Chicago (17e ed.) Bronvermelding

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

MLA (9e ed.) Bronvermelding

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