APA (7e ed.) Bronvermelding

Não informado. (1969). Elements. University of Alberta, Department of Elementary Education.

Chicago (17e ed.) Bronvermelding

Não informado. Elements. Alberta, Canada: University of Alberta, Department of Elementary Education, 1969.

MLA (8e ed.) Bronvermelding

Não informado. Elements. University of Alberta, Department of Elementary Education, 1969.

Let op: Deze citaties zijn niet altijd 100% accuraat.