Bergmann, P. G., Fenyves, E. J., & Motz, L. (1975). Seventh Texas Symposium on Relativistic Astrophysics Q11 .N5 197. New York Academy of Sciences.
Cita Chicago (17th ed.)Bergmann, Peter Gabriel, Ervin J. Fenyves, i Lloyd Motz. Seventh Texas Symposium on Relativistic Astrophysics Q11 .N5 197. New York: New York Academy of Sciences, 1975.
Cita MLA (9th ed.)Bergmann, Peter Gabriel, et al. Seventh Texas Symposium on Relativistic Astrophysics Q11 .N5 197. New York Academy of Sciences, 1975.
Atenció: Aquestes cites poden no estar 100% correctes.