APA (7e ed.) Bronvermelding

Não informado. (1947). Elementary English. National Council of Teachers of English.

Chicago (17e ed.) Bronvermelding

Não informado. Elementary English. Champaign, Ill: National Council of Teachers of English, 1947.

MLA (8e ed.) Bronvermelding

Não informado. Elementary English. National Council of Teachers of English, 1947.

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