Collocations :
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1. http://www.natcorp.ox.ac.uk/ -----------> British National Corpus ( British
English )

single copy: GBP 75+ International shipment( Unknown ?)
packs of ten: GBP 500 (500/10) + International shipment ( Unknown?)

2. http://www.americancorpus.org/-----------> American National Corpus
(American English )


3. www.corpus4u.org

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You can find some relevant articles among these textbooks

1. Usage and abusage ( International shipment )
or this one ---> Garner's Modern American Usage (Google )

2. A Comprehensive Grammar of the English Language (Google )

3. The Cambridge Grammar of the English Language --> Too expensive
(£100~130 )

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Two of the most useful writing textbooks I've read so far are

Correction--->1. Make your words work or Beyond Style ( By Gary Provost )


2. The Pyramid Principle ( By Barbara Minto ) ---> Too expensive (£ 30~50)
or THE MINTO PYRAMID PRINCIPLE 金字塔原理 ( Traditional Chinese )


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