Gaya APA
Johnson, George B.. (2010).
Essentials of the living world (3th ed.).
New York:
McGraw Hill.
Gaya Chicago
Johnson, George B..
Essentials of the living world.
3th ed.
New York:
McGraw Hill,
2010.
Text.
Gaya MLA
Johnson, George B..
Essentials of the living world.
3th ed.
New York:
McGraw Hill,
2010.
Text.
Gaya Turabian
Johnson, George B..
Essentials of the living world.
3th ed.
New York:
McGraw Hill,
2010.
Print.