APA (7e ed.) Bronvermelding

Não informado. Abstracts. Technical Intelligent Branch, Coal House.

Chicago (17e ed.) Bronvermelding

Não informado. Abstracts. London: Technical Intelligent Branch, Coal House.

MLA (8e ed.) Bronvermelding

Não informado. Abstracts. Technical Intelligent Branch, Coal House.

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