Citazione Stile APA (7a Edizione)

(1987). Environmental studies: Pupil's workbook; [primary curriculum development project] (3. reprint.). Ed. de l'Océan Indien.

Citazione stile Chigago Style (17a edizione)

Environmental Studies: Pupil's Workbook; [primary Curriculum Development Project]. 3. reprint. [S.l.]: Ed. de l'Océan Indien, 1987.

Citatione MLA (9a ed.)

Environmental Studies: Pupil's Workbook; [primary Curriculum Development Project]. 3. reprint. Ed. de l'Océan Indien, 1987.