Cita APA (7th ed.)
Glassgold, A. E., Huggins, P. J., & Schucking, E. L. (1982). Symposium on the Orion nebula to honor Henry Draper. The New York Acad. of Sciences.
Cita Chicago (17th ed.)
Glassgold, A. E., P. J. Huggins, i E. L. Schucking. Symposium on the Orion Nebula to Honor Henry Draper. New York, New York: The New York Acad. of Sciences, 1982.
Cita MLA (9th ed.)
Glassgold, A. E., et al. Symposium on the Orion Nebula to Honor Henry Draper. The New York Acad. of Sciences, 1982.
Atenció: Aquestes cites poden no estar 100% correctes.