On the page
http://www.allaboutcircuits.com/vol_3/chpt_4/5.html

under :
SPICE version of common emitter audio amplifier.
the program is :

common-emitter amplifier
vinput 1 0 sin (0 1.5 2000 0 0)
r1 1 2 1k
q1 3 2 0 mod
rspkr 3 4 8
v1 4 0 dc 15
.model mod1 npn
.tran 0.02m 0.74m
.plot tran v(1,0) i(v1)
.end

It should be
q1 3 2 0 mod1

 

Thanks silv3r.m00n for pointing out this correction. The fix has been amed to the master copy at ibiblio.org