join 4 tables

I have 4 tables i.e company_profile,company_people,area_of_work,area_of_practice.And out of that 3 tables have primary key which is company_id.The 3 tables are company_profile,company_people,area_of_work.4th table which is area_of_practice has common or matching field with area_of_work table which is practice_id.

I want to create join to get results from all the four tables.

Can anyone can help me.

Thanks in advance.

Lovinguy

Below are the details of table & column name

COMPANY_PROFILE(tABLE)
COMPANY_ID
FIRSTNAME
LASTNAME
COMPANY_ID
email
phone
address

COMPANY_PEOPLE(TABLE)
company_id
state
city
country

AREA_OF_WORK(TABLE)
COMPANY_ID
PRACTICE_ID
WORK_SEQUENCE


AREA_OF_PRACTICE(TABLE)
CATEGORY
PRACTICE_ID


I want to pull or create a join query resulting company_id,first_name from COMPANY_PROFILE(TABLE).STATE & CITY FROM COMPANY_PEOPLE(TABLE).PRACTICE_ID FROM COMPANY_PEOPLE(TABLE).CATEGORY FROM AREA_OF_PRACTICE