APA (7e ed.) Bronvermelding

Não informado. (1959). Stal in english. Iron and Stell Institute.

Chicago (17e ed.) Bronvermelding

Não informado. Stal in English. London: Iron and Stell Institute, 1959.

MLA (8e ed.) Bronvermelding

Não informado. Stal in English. Iron and Stell Institute, 1959.

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