LARSEN, K. (2007). STEPEN, HAWKING - A BIOGRAPHY. PROMETHES BOOKS.
Cita Chicago (17th ed.)LARSEN, KRISTINE. STEPEN, HAWKING - A BIOGRAPHY. NEWYORK: PROMETHES BOOKS, 2007.
Cita MLA (9th ed.)LARSEN, KRISTINE. STEPEN, HAWKING - A BIOGRAPHY. PROMETHES BOOKS, 2007.
Atenció: Aquestes cites poden no estar 100% correctes.