Style de citation APA (7e éd.)
(1994). Project learning tree: Environmental education activity guide (2nd.). Project Learning Tree.
Style de citation Chicago (17e éd.)
Project Learning Tree: Environmental Education Activity Guide. 2nd. Washington: Project Learning Tree, 1994.
Style de citation MLA (9e éd.)
Project Learning Tree: Environmental Education Activity Guide. 2nd. Project Learning Tree, 1994.
Attention : ces citations peuvent ne pas être correctes à 100%.