Bentzen, W. R. (1997). a guide to observing and recording behavior: A guide to observing and recording behavior (3rd ed.). Delmar Publishers.
Citazione stile Chigago Style (17a edizione)Bentzen, Warren R. A Guide to Observing and Recording Behavior: A Guide to Observing and Recording Behavior. 3rd ed. Albany: Delmar Publishers, 1997.
Citatione MLA (9a ed.)Bentzen, Warren R. A Guide to Observing and Recording Behavior: A Guide to Observing and Recording Behavior. 3rd ed. Delmar Publishers, 1997.
Attenzione: Queste citazioni potrebbero non essere precise al 100%.