APA Style
Koch, A. Robert. (1986).
Economic Principles: Growth and Environment .
Amerika:
Avi Publishing Company.
Chicago Style
Koch, A. Robert.
Economic Principles: Growth and Environment.
Amerika:
Avi Publishing Company,
1986.
Text.
MLA Style
Koch, A. Robert.
Economic Principles: Growth and Environment.
Amerika:
Avi Publishing Company,
1986.
Text.
Turabian Style
Koch, A. Robert.
Economic Principles: Growth and Environment.
Amerika:
Avi Publishing Company,
1986.
Print.