Cita APA (7th ed.)
Kramer, L., & Luttmann, E. (2015). The normal hearth. Arcadia & Ricono.
Cita Chicago (17th ed.)
Kramer, Larry, i Enrico Luttmann. The Normal Hearth. Roma: Arcadia & Ricono, 2015.
Cita MLA (9th ed.)
Kramer, Larry, i Enrico Luttmann. The Normal Hearth. Arcadia & Ricono, 2015.
Atenció: Aquestes cites poden no estar 100% correctes.