(1995). Earth and beyond. Macmillan.
Chicago Style (17th ed.) CitationEarth and Beyond. New York: Macmillan, 1995.
MLA (9th ed.) CitationEarth and Beyond. Macmillan, 1995.
Advarsel: Disse citationer er muligvist ikke 100% nøjagtige.
(1995). Earth and beyond. Macmillan.
Chicago Style (17th ed.) CitationEarth and Beyond. New York: Macmillan, 1995.
MLA (9th ed.) CitationEarth and Beyond. Macmillan, 1995.