Helsop, A. (1999). Ageing and Development.
Cita Chicago Style (17a ed.)Helsop, Amanda. Ageing and Development. 1999.
Cita MLA (8a ed.)Helsop, Amanda. Ageing and Development. 1999.
Precaución: Estas citas no son 100% exactas.
Cita APA (7a ed.)