APA (7e ed.) Bronvermelding
Poulsen, E. (2009). Smiling bears: A zookeeper explores the behavior and emotional life of bears. Greystone Books.
Chicago (17e ed.) Bronvermelding
Poulsen, Else. Smiling Bears: A Zookeeper Explores the Behavior and Emotional Life of Bears. Vancouver: Greystone Books, 2009.
MLA (9e ed.) Bronvermelding
Poulsen, Else. Smiling Bears: A Zookeeper Explores the Behavior and Emotional Life of Bears. Greystone Books, 2009.
Let op: Deze citaties zijn niet altijd 100% accuraat.