Aspden, H. (1969). Physics: Without Einstein. Sabberton.
Cita Chicago (17th ed.)Aspden, Harold. Physics: Without Einstein. Southampton: Sabberton, 1969.
Cita MLA (9th ed.)Aspden, Harold. Physics: Without Einstein. Sabberton, 1969.
Atenció: Aquestes cites poden no estar 100% correctes.