Cita APA (7a ed.)

Poresky, R. H., & Daniels, A. M. (1998). Demographics of pet presence and attachment. [s.n.].

Cita Chicago Style (17a ed.)

Poresky, Robert H., y Ann Michelle Daniels. Demographics of Pet Presence and Attachment. [S.l.]: [s.n.], 1998.

Cita MLA (9a ed.)

Poresky, Robert H., y Ann Michelle Daniels. Demographics of Pet Presence and Attachment. [s.n.], 1998.