Lanham, U. (1981). La Tierra, un planeta singular. Ateneo.
Chicago Style (17th ed.) CitationLanham, Url. La Tierra, Un Planeta Singular. Buenos Aires [etc.]: Ateneo, 1981.
MLA (9th ed.) CitationLanham, Url. La Tierra, Un Planeta Singular. Ateneo, 1981.
Warning: These citations may not always be 100% accurate.