APA (7e ed.) Bronvermelding

Não informado. (1974). Quarry management and products. Quarry Managers Journal.

Chicago (17e ed.) Bronvermelding

Não informado. Quarry Management and Products. London: Quarry Managers Journal, 1974.

MLA (8e ed.) Bronvermelding

Não informado. Quarry Management and Products. Quarry Managers Journal, 1974.

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