Cita APA (7a ed.)

Birnbaum, G., & Free, G. (1981). Eddy-Current Characterization of Materials and Structures: : A symposium sponsored by ASTM. Gaithersburg, Md., 5-7 Sept. 1979 (1979.Gaithersburg). ASTM.

Cita Chicago Style (17a ed.)

Birnbaum, George, y George Free. Eddy-Current Characterization of Materials and Structures: : A Symposium Sponsored by ASTM. Gaithersburg, Md., 5-7 Sept. 1979 (1979.Gaithersburg). Philadelphia: ASTM, 1981.

Cita MLA (9a ed.)

Birnbaum, George, y George Free. Eddy-Current Characterization of Materials and Structures: : A Symposium Sponsored by ASTM. Gaithersburg, Md., 5-7 Sept. 1979 (1979.Gaithersburg). ASTM, 1981.