APA Format
Bassett, W.H.
; Davies, F.G.
. (1981, 1992). Clay's handbook of environmental health. London : H.K. Lewis
MLA Format
Bassett, W.H.; Davies, F.G.
. Clay's handbook of environmental health. London : H.K. Lewis, 1981, 1992
Australian/Harvard Format
Bassett, W.H.
; Davies, F.G.
. 1981, 1992. Clay's handbook of environmental health. H.K. Lewis, London
Warning: These citations may not always be 100% accurate.