Gaya APA
Esterer, Arnulf K.. (1966).
Tools: Shapers of Human Progress .
Greenwich:
Fawcett Publications.
Gaya Chicago
Esterer, Arnulf K..
Tools: Shapers of Human Progress.
Greenwich:
Fawcett Publications,
1966.
Text.
Gaya MLA
Esterer, Arnulf K..
Tools: Shapers of Human Progress.
Greenwich:
Fawcett Publications,
1966.
Text.
Gaya Turabian
Esterer, Arnulf K..
Tools: Shapers of Human Progress.
Greenwich:
Fawcett Publications,
1966.
Print.