O'BRIEN, T. FUN FACTS SCIENCE. RUPA BOOKS.
Cita Chicago (17th ed.)O'BRIEN, TERRY. FUN FACTS SCIENCE. FACTS; SCIENCE; INFORMATION: RUPA BOOKS.
Cita MLA (9th ed.)O'BRIEN, TERRY. FUN FACTS SCIENCE. RUPA BOOKS.
Atenció: Aquestes cites poden no estar 100% correctes.