Hoyle, F. (1983). El universo inteligente. Grigalbo.
Chicago Style (17th ed.) CitationHoyle, Fred. El Universo Inteligente. Barcelona: Grigalbo, 1983.
MLA (9th ed.) CitationHoyle, Fred. El Universo Inteligente. Grigalbo, 1983.
Warning: These citations may not always be 100% accurate.