Gaya APA
Olmstead, Kathleen., Freeberg, Eric. (2011).
Journey to the Center Of the Earth .
United States:
Sterling.
Gaya Chicago
Olmstead, Kathleen., Freeberg, Eric.
Journey to the Center Of the Earth.
United States:
Sterling,
2011.
print.
Gaya MLA
Olmstead, Kathleen., Freeberg, Eric.
Journey to the Center Of the Earth.
United States:
Sterling,
2011.
print.
Gaya Turabian
Olmstead, Kathleen., Freeberg, Eric.
Journey to the Center Of the Earth.
United States:
Sterling,
2011.
print.