Cita APA (7th ed.)

Preston, P. (1982). Theories of development. Routledge and kegan Paul.

Cita Chicago (17th ed.)

Preston, P.w. Theories of Development. London: Routledge and kegan Paul, 1982.

Cita MLA (9th ed.)

Preston, P.w. Theories of Development. Routledge and kegan Paul, 1982.