Cita APA (7th ed.)

Smith, P. K. (1991). The psychology of grandparenthood: An interpersonal perspective. Routledge.

Cita Chicago (17th ed.)

Smith, Peter K. The Psychology of Grandparenthood: An Interpersonal Perspective. London: Routledge, 1991.

Cita MLA (9th ed.)

Smith, Peter K. The Psychology of Grandparenthood: An Interpersonal Perspective. Routledge, 1991.