(;
AB[mc][pc][qd][qg]
AW[lc][ld][od][ne]
C[Black plays.

Source:
"Good and Bad Style"
Go World #26, p. 26,  Winter 1981]
(;
B[oc]
C[Pushing here is inefficient.  Yes, Black secures a connection, but that's about all.]
)
    (;
    B[nb]
    LB[lb:A][md:B]
    C[Correct shape that all go players should learn to play immediately.

Black not only secures a connection to the corner, but also threatens a sente hane at A, as well as a push and cut starting with B.]
    )
)

