Cita APA (7th ed.)
Swartz, C. E. (2003). Back-of-the-envelope physics. Johns Hopkins University Press.
Cita Chicago (17th ed.)
Swartz, Clifford E. Back-of-the-envelope Physics. Baltimore: Johns Hopkins University Press, 2003.
Cita MLA (9th ed.)
Swartz, Clifford E. Back-of-the-envelope Physics. Johns Hopkins University Press, 2003.
Atenció: Aquestes cites poden no estar 100% correctes.