Dyfyniad APA

Bassett, W. (2002). Environmental health procedures (6th.). SPON Press.

Dyfyniad Arddull Chicago

Bassett, W.H. Environmental Health Procedures. 6th. London: SPON Press, 2002.

Dyfyniad MLA

Bassett, W.H. Environmental Health Procedures. 6th. SPON Press, 2002.

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