University of Illinois (Urbana-Champaign campus), Elementary School Science Project, Atkin, J. M., & Wyatt, S. P. (1969). The University of Illinois astronomy program. Harper & Row.
Citace podle Chicago (17th ed.)University of Illinois (Urbana-Champaign campus), Elementary School Science Project, J. Myron Atkin, a Stanley P. Wyatt. The University of Illinois Astronomy Program. New York: Harper & Row, 1969.
Citace podle MLA (8th ed.)University of Illinois (Urbana-Champaign campus), et al. The University of Illinois Astronomy Program. Harper & Row, 1969.
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