Biologi - John W. Kimball (Erlangga, 1983)
ws.jl.3.c.1, jl.1-2.c.1-3; sn,jl.2,c.4; jl.3,c.2/ir, jil.3,c.3/tr, jil.3=c.4-5/isr,jil.1,c.4/ir, jil.2,c.5/tr, jil.1=c.5; jil.2=c.6