Gaya APA
Raven, Berg & Johnson. (1993).
International Edisi Environment 1995 .
:
Saunders College Pub..
Gaya Chicago
Raven, Berg & Johnson.
International Edisi Environment 1995.
:
Saunders College Pub.,
1993.
Text.
Gaya MLA
Raven, Berg & Johnson.
International Edisi Environment 1995.
:
Saunders College Pub.,
1993.
Text.
Gaya Turabian
Raven, Berg & Johnson.
International Edisi Environment 1995.
:
Saunders College Pub.,
1993.
Print.