Cita APA (7a ed.)

Endenburg, N. (1995). The attachment of people to companion animals. [s.n.].

Cita Chicago Style (17a ed.)

Endenburg, Nienke. The Attachment of People to Companion Animals. [S.l.]: [s.n.], 1995.

Cita MLA (9a ed.)

Endenburg, Nienke. The Attachment of People to Companion Animals. [s.n.], 1995.