Gaya APA
George, S. (1964).
the New Science of Econmics : An Introduction (Cetakan Pertama).
Newyork:
A Fawcett Premier Book.
Gaya MLA
George, Soule.
"the New Science of Econmics : An Introduction".
Cetakan Pertama
Newyork:
A Fawcett Premier Book,
1964.
Text.