Translate Sql Statement Into SQL-92 Standards

Can anyone help me translate this statement from using the legacy
outer joins to the SQL-92 standards?

Select CA.* From Customer C, Shipper S, Customer_Order CO,
Cust_Address CA Where CA.Customer_ID =* CO.Customer_ID
and CA.Addr_No =* isnull(S.Ship_To_Addr_No,CO.Ship_To_Addr_No)
and C.ID = CO.Customer_ID
and (S.Shipped_Date between '1/1/2003' and '12/31/2003')

Try as I may, I simply can't find a working left, right, or full outer
join statement that would give me the same results as the above
statement gives. I thought this was suppose to work but don't know
why it doesn't. Anybody care to try or perhaps tell me why the
statement below doesn't work:

Select CA.* From Customer C, ((Customer_Order CO left outer join
Cust_Address CA on CA.Customer_ID = CO.Customer_ID) left outer join
Shipper S on CA.Addr_No =
isnull(S.Ship_To_Addr_No,CO.Ship_To_Addr_No)) Where C.ID =
CO.Customer_ID
and (S.Shipped_Date between '1/1/2003' and '12/31/2003')

Thanks,
Tony