APA aipamena

Hat Markowitz. (1982). Behavioural enrichment in the zoo. New York.

Chicago Style aipamena

Hat Markowitz. Behavioural Enrichment in the Zoo. New York, 1982.

MLA aipamena

Hat Markowitz. Behavioural Enrichment in the Zoo. New York, 1982.

Kontuz: berrikusi erreferentzia hauek erabili aurretik.