APA (7e ed.) Bronvermelding

Não informado. (2004). Steam and Heating Engineer. Troup Publications.

Chicago (17e ed.) Bronvermelding

Não informado. Steam and Heating Engineer. London: Troup Publications, 2004.

MLA (8e ed.) Bronvermelding

Não informado. Steam and Heating Engineer. Troup Publications, 2004.

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