American Foundation for Continuing Education & Young, L. B. e. (1963). Exploring the universe. McGraw-Hill.
Chicago Style (17th ed.) CitationAmerican Foundation for Continuing Education and Louise B. ed Young. Exploring the Universe. New York: McGraw-Hill, 1963.
MLA (9th ed.) CitationAmerican Foundation for Continuing Education and Louise B. ed Young. Exploring the Universe. McGraw-Hill, 1963.
Advarsel: Disse citationer er muligvist ikke 100% nøjagtige.