Gaya APA
Parkman, Francis. (1950).
The Oregon Trail .
London:
A Signet Classic.
Gaya Chicago
Parkman, Francis.
The Oregon Trail.
London:
A Signet Classic,
1950.
.
Gaya MLA
Parkman, Francis.
The Oregon Trail.
London:
A Signet Classic,
1950.
.
Gaya Turabian
Parkman, Francis.
The Oregon Trail.
London:
A Signet Classic,
1950.
.