Gaya APA
Heffner, Richard D.. (1976).
A documentary history of The United States (3rd).
London:
A Mentor Book New American Library .
Gaya Chicago
Heffner, Richard D..
A documentary history of The United States.
3rd
London:
A Mentor Book New American Library ,
1976.
Text.
Gaya MLA
Heffner, Richard D..
A documentary history of The United States.
3rd
London:
A Mentor Book New American Library ,
1976.
Text.
Gaya Turabian
Heffner, Richard D..
A documentary history of The United States.
3rd
London:
A Mentor Book New American Library ,
1976.
Print.