APA (7e ed.) Bronvermelding

Close, Avrille. (1992). Flexible learning for balanced science: Resources for initial teacher training and inset. H.M.S.O.

Chicago (17e ed.) Bronvermelding

Close, Avrille. Flexible Learning for Balanced Science: Resources for Initial Teacher Training and Inset. London: H.M.S.O, 1992.

MLA (9e ed.) Bronvermelding

Close, Avrille. Flexible Learning for Balanced Science: Resources for Initial Teacher Training and Inset. H.M.S.O, 1992.