Cita APA (7a ed.)

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

Cita Chicago Style (17a ed.)

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

Cita MLA (9a ed.)

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