APA (7e ed.) Bronvermelding

Não informado. (2003). Contractors record and municipal engineering. [s.n.].

Chicago (17e ed.) Bronvermelding

Não informado. Contractors Record and Municipal Engineering. [s.l.]: [s.n.], 2003.

MLA (8e ed.) Bronvermelding

Não informado. Contractors Record and Municipal Engineering. [s.n.], 2003.

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