Gaya APA
Allen, John L.. (2002).
Environment 02/03 (Twenty-First Edition).
Guilford, Connecticut:
McGraw-Hill/Dushkin.
Gaya Chicago
Allen, John L..
Environment 02/03.
Twenty-First Edition
Guilford, Connecticut:
McGraw-Hill/Dushkin,
2002.
Text.
Gaya MLA
Allen, John L..
Environment 02/03.
Twenty-First Edition
Guilford, Connecticut:
McGraw-Hill/Dushkin,
2002.
Text.
Gaya Turabian
Allen, John L..
Environment 02/03.
Twenty-First Edition
Guilford, Connecticut:
McGraw-Hill/Dushkin,
2002.
Print.