Gaya APA
von Bertalanffy, Ludwig. (1972).
General system theory .
New York:
George Braziller.
Gaya Chicago
von Bertalanffy, Ludwig.
General system theory.
New York:
George Braziller,
1972.
Text.
Gaya MLA
von Bertalanffy, Ludwig.
General system theory.
New York:
George Braziller,
1972.
Text.
Gaya Turabian
von Bertalanffy, Ludwig.
General system theory.
New York:
George Braziller,
1972.
Print.